diff --git a/.ci/AppVeyor.ps1 b/.ci/AppVeyor.ps1
new file mode 100644
index 0000000000..2aa397831c
--- /dev/null
+++ b/.ci/AppVeyor.ps1
@@ -0,0 +1,22 @@
+. .ci/FudgeGenerateFake.ps1
+. .ci/PrepareAVVM.ps1
+
+function Set-Python-Arch
+{
+  # run_with_env.cmd needs PYTHON_ARCH set to 64 for x64
+  if ($env:Platform -eq 'x64')
+  {
+    Set-ItemProperty -path 'HKCU:\Environment' -name 'PYTHON_ARCH' -value '64'
+  }
+}
+
+function Fix-AppVeyor
+{
+  Set-Python-Arch
+
+  $config = Get-FudgefileContent .ci/Fudgefile.appveyor
+
+  PackFakeNupkgs $config.packages
+
+  Setup-Products $config.packages
+}
diff --git a/.ci/FudgeGenerateFake.ps1 b/.ci/FudgeGenerateFake.ps1
new file mode 100644
index 0000000000..0431e4241e
--- /dev/null
+++ b/.ci/FudgeGenerateFake.ps1
@@ -0,0 +1,61 @@
+Set-StrictMode -Version latest
+
+function GenerateFakeNuspec
+{
+  param (
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $name,
+
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $version
+  )
+
+  $template = Get-Content .ci\nuspecs\template.nuspec.in
+
+  $content = $template -replace '{name}', $name
+  $content = $content -replace '{version}', $version
+
+  $nuspec = ('.ci\nuspecs\' + $name + '.nuspec')
+
+  Set-Content $nuspec $content
+
+  Write-Output "Created $nuspec"
+}
+
+function GenerateFakeNuspecs
+{
+  param (
+    [array]
+    $Packages
+  )
+
+  foreach ($pkg in $Packages)
+  {
+    GenerateFakeNuspec $pkg.name $pkg.version
+  }
+}
+
+function PackFakeNupkgs
+{
+  param (
+    [array]
+    $Packages
+  )
+
+  GenerateFakeNuspecs $Packages
+
+  foreach ($pkg in $Packages)
+  {
+    $filename = ($pkg.name + '.nuspec')
+    choco pack ".ci\nuspecs\$filename" > $null
+  }
+  mv *.nupkg .ci\nuspecs\
+
+  # fudge pack -FudgefilePath .ci/Fudgefile.appveyor
+
+  Write-Output 'Packed!'
+}
diff --git a/.ci/FudgePostInstall.ps1 b/.ci/FudgePostInstall.ps1
new file mode 100644
index 0000000000..ff7d1efebb
--- /dev/null
+++ b/.ci/FudgePostInstall.ps1
@@ -0,0 +1,182 @@
+. $env:ChocolateyInstall\helpers\functions\Write-FunctionCallLogMessage.ps1
+. $env:ChocolateyInstall\helpers\functions\Get-EnvironmentVariable.ps1
+. $env:ChocolateyInstall\helpers\functions\Get-EnvironmentVariableNames.ps1
+. $env:ChocolateyInstall\helpers\functions\Start-ChocolateyProcessAsAdmin.ps1
+. $env:ChocolateyInstall\helpers\functions\Set-EnvironmentVariable.ps1
+. $env:ChocolateyInstall\helpers\functions\Set-PowerShellExitCode.ps1
+. $env:ChocolateyInstall\helpers\functions\Update-SessionEnvironment.ps1
+. $env:ChocolateyInstall\helpers\functions\Write-FunctionCallLogMessage.ps1
+. $env:ChocolateyInstall\helpers\functions\Install-ChocolateyPath.ps1
+
+Set-StrictMode -Version latest
+
+
+function Get-PHP-Root
+{
+  $list = Get-ChildItem -Directory 'C:\tools\' | Out-String
+  Write-Verbose $list
+
+  Get-ChildItem -Directory 'C:\tools\' -filter 'php*' | % {
+    $PHP_ROOT = $_.FullName
+
+    Write-Host 'Setting PHP_ROOT='$PHP_ROOT
+
+    Set-ItemProperty -path 'HKCU:\Environment' -name 'PHP_ROOT' -value $PHP_ROOT
+  }
+  if ($PHP_ROOT) {
+    return $PHP_ROOT
+  }
+  throw ('php not found in ' + $list)
+}
+
+function Create-PHP-Ini
+{
+  param (
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $PHP_ROOT
+  )
+
+  $PHP_INI = ($PHP_ROOT + '\php.ini')
+
+  Write-Host 'Creating '$PHP_INI
+
+  cp ($PHP_INI + '-production') $PHP_INI
+  sed -i 's/;date.timezone =.*/date.timezone=UTC/' $PHP_INI
+
+  $list = Get-ChildItem -Recurse $PHP_ROOT | Out-String
+  Write-Verbose ('php dir ' + $list)
+
+  Write-Host 'Enabling PHP openssl ...'
+
+  $openssl_dll = ''
+
+  Get-ChildItem $PHP_ROOT -Recurse -filter '*openssl*.dll' | % {
+    $openssl_dll = $_.FullName
+    Write-Host ' found '$openssl_dll
+  }
+  if (! $openssl_dll) {
+    Write-Host ' not found'
+    throw ('openssl not found in ' + $list)
+  }
+
+  sed -i 's/;extension=openssl/extension=openssl/' $PHP_INI
+
+  $dir = Split-Path -Path $openssl_dll
+  Write-Host 'Setting extension directory: '$dir
+
+  (Get-Content $PHP_INI) | % {
+    $_ -replace ';extension_dir *=.*', ('extension_dir="' + $dir + '"')
+  } | Set-Content $PHP_INI
+
+  grep '^extension' $PHP_INI
+}
+
+function Install-PEAR
+{
+  param (
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $PHP_ROOT
+  )
+
+  $PHP = ($PHP_ROOT + '\php.exe')
+
+  Write-Host 'Installing PEAR'
+
+  $pear_install_url = 'http://pear.php.net/install-pear-nozlib.phar'
+  $phar = $env:TMP + '\install-pear.phar'
+
+  curl -o $phar $pear_install_url
+
+  $opts = ('-b ' + $PHP_ROOT + ' -d ' + $PHP_ROOT + ' -p ' + $PHP)
+
+  Invoke-Expression ($PHP + ' ' + $phar + ' ' + $opts)
+}
+
+function Update-PEAR
+{
+  param (
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $PHP_ROOT
+  )
+
+  $PHP = ($PHP_ROOT + '\php.exe')
+
+  Write-Host 'Updating PEAR channel pear.php.net'
+
+  $pearcmd = ($PHP_ROOT + '\pearcmd.php')
+
+  $pear_update_cmd = ($PHP + ' ' + $pearcmd + ' channel-update pear.php.net')
+
+  Invoke-Expression $pear_update_cmd
+}
+
+function Add-R-to-PATH
+{
+  $list = Get-ChildItem -Directory 'C:\Program Files\R' | Out-String
+  Write-Verbose $list
+
+  Get-ChildItem -Directory 'C:\Program Files\R' | % {
+    $R_ROOT = $_.FullName
+
+    # $R_ROOT = $R_ROOT -replace 'C:\\Program Files', '%ProgramFiles%'
+
+    Write-Host 'Setting R_ROOT='$R_ROOT
+
+    Set-ItemProperty -path 'HKCU:\Environment' -name 'R_ROOT' -value $R_ROOT
+
+    $R_BIN = ($R_ROOT + '\bin')
+
+    Install-ChocolateyPath -PathToInstall $R_BIN
+  }
+  if ($R_ROOT) {
+    return $R_ROOT
+  }
+  throw ('R not found in ' + $list)
+}
+
+function Update-Cabal
+{
+  cabal update
+}
+
+function PPM-Install-cpanm
+{
+  ppm install App-cpanminus
+}
+
+function Install-GoMetaLinter
+{
+  go.exe get -u gopkg.in/alecthomas/gometalinter.v2
+}
+
+function Install-GoPM
+{
+  go.exe get -u github.com/gpmgo/gopm
+  go.exe install github.com/gpmgo/gopm
+}
+
+function Fixes
+{
+  $PHP_ROOT = Get-PHP-Root
+
+  Create-PHP-Ini $PHP_ROOT
+  Install-PEAR $PHP_ROOT
+  Update-PEAR $PHP_ROOT
+
+  Add-R-to-PATH
+
+  Update-Cabal
+
+  PPM-Install-cpanm
+
+  Install-GoMetaLinter
+  Install-GoPM
+
+  return $LastExitCode
+}
diff --git a/.ci/Fudgefile.appveyor b/.ci/Fudgefile.appveyor
new file mode 100644
index 0000000000..b0abed8a80
--- /dev/null
+++ b/.ci/Fudgefile.appveyor
@@ -0,0 +1,24 @@
+{
+    "scripts": {
+        "pre": {
+            "install": ". .ci/AppVeyor.ps1; Fix-AppVeyor"
+        }
+    },
+    "source": ".ci/nuspecs",
+    "packages": [
+        { "name": "python", "version": "3.6.8" },
+        { "name": "nodejs", "version": "11.13.0" },
+        { "name": "ruby", "version": "2.6.1.1" },
+        { "name": "golang", "version": "1.9.7" },
+        { "name": "StrawberryPerl", "version": "5.28.0.1" },
+        { "name": "miniconda3", "version": "4.5.12" }
+    ],
+    "pack": {
+        "python": ".ci/nuspecs/python.nuspec",
+        "nodejs": ".ci/nuspecs/nodejs.nuspec",
+        "ruby": ".ci/nuspecs/ruby.nuspec",
+        "golang": ".ci/nuspecs/golang.nuspec",
+        "StrawberryPerl": ".ci/nuspecs/StrawberryPerl.nuspec",
+        "miniconda3": ".ci/nuspecs/miniconda3.nuspec"
+    }
+}
diff --git a/.ci/PrepareAVVM.ps1 b/.ci/PrepareAVVM.ps1
new file mode 100644
index 0000000000..66dd2260b7
--- /dev/null
+++ b/.ci/PrepareAVVM.ps1
@@ -0,0 +1,285 @@
+Set-StrictMode -Version latest
+
+$PACKAGES_ROOT = "$env:SYSTEMDRIVE\avvm"
+$REGISTRY_ROOT = 'HKLM:\Software\AppVeyor\VersionManager'
+
+function Get-Version([string]$str) {
+    $versionDigits = $str.Split('.')
+    $version = @{
+        major = -1
+        minor = -1
+        build = -1
+        revision = -1
+        number = 0
+        value = $null
+    }
+
+    $version.value = $str
+
+    if($versionDigits -and $versionDigits.Length -gt 0) {
+        $version.major = [int]$versionDigits[0]
+    }
+    if($versionDigits.Length -gt 1) {
+        $version.minor = [int]$versionDigits[1]
+    }
+    if($versionDigits.Length -gt 2) {
+        $version.build = [int]$versionDigits[2]
+    }
+    if($versionDigits.Length -gt 3) {
+        $version.revision = [int]$versionDigits[3]
+    }
+
+    for($i = 0; $i -lt $versionDigits.Length; $i++) {
+        $version.number += [long]$versionDigits[$i] -shl 16 * (3 - $i)
+    }
+
+    return $version
+}
+
+function SetInstalledProductVersion {
+  param (
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $product,
+
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $version,
+
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $platform
+  )
+
+  $productRegPath = "$REGISTRY_ROOT\$product"
+  New-Item $productRegPath -Force | Out-Null
+  New-ItemProperty -Path $productRegPath -Name Version -PropertyType String -Value $version -Force | Out-Null
+  New-ItemProperty -Path $productRegPath -Name Platform -PropertyType String -Value $platform -Force | Out-Null
+
+  Write-Output "Creating C:\avvm\$product\$version\$platform"
+
+  if (!(Test-Path "C:\avvm\$product\$version\$platform")) {
+    mkdir "C:\avvm\$product\$version\$platform" -Force > $null
+  }
+
+  if (!(Test-Path "C:\avvm\$product\$version\$platform")) {
+    throw "Something went wrong"
+  }
+
+}
+
+function GetInstalledProductVersion($product) {
+    $productRegPath = "$REGISTRY_ROOT\$product"
+    if(Test-Path $productRegPath) {
+        $ver = Get-ItemProperty -Path $productRegPath
+        @{
+            Product = $product
+            Version = $ver.Version
+            Platform = $ver.Platform
+        }
+    }
+}
+
+function Add-Product
+{
+  param (
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $product,
+
+    [Parameter(Mandatory=$true)]
+    [ValidateNotNullOrEmpty()]
+    [string]
+    $version,
+
+    [string]
+    $platform
+  )
+
+  $name = $product
+
+  if (! $platform) {
+    $platform = $env:platform
+  }
+
+  $installed = GetInstalledProductVersion $Product
+  if ($installed) {
+    if ($installed.Version -eq $version) {
+      if ($installed.Platform -eq $env:platform) {
+        Write-Output "$product $version $env:platform already set up"
+        return;
+      }
+    }
+  }
+
+  $shortver = ($version.split('.'))[0..1]
+  $shortver = "{0}{1}" -f ($shortver[0], $shortver[1])
+
+  $dir_name = $name;
+
+  if (Test-Path "C:\avvm\$name\$version\") {
+    Write-Output "C:\avvm\$name\$version exists; skipping"
+
+    $base = 'https://appveyordownloads.blob.core.windows.net/avvm'
+    $versions_content = (New-Object Net.WebClient).DownloadString("$base/$name-versions.txt")
+    Set-Content "C:\avvm\$name-versions.txt" $versions_content
+    return
+  }
+
+  if ($installed) {
+    $current_version = $installed.Version
+    if ((Get-Version $current_version).number > (Get-Version $version).number) {
+      $versions_content = "$current_version
+$version
+lts:$version
+stable:$version
+current:$current_version
+"
+    } else {
+      $versions_content = "$version
+$current_version
+lts:$version
+stable:$version
+current:$current_version
+"
+    }
+  }
+  else {
+    $versions_content = "$version
+lts:$version
+stable:$version
+"
+  }
+  Set-Content "C:\avvm\$name-versions.txt" $versions_content
+
+  Write-Output "Wrote C:\avvm\$name-versions.txt"
+
+  mkdir "C:\avvm\$name" -Force > $null
+
+  mkdir "C:\avvm\$name\$version" -Force > $null
+
+  Write-Verbose "Looking for $shortver C:\$dir_name$shortver .."
+
+  if (!( Test-Path "C:\$dir_name$shortver")) {
+    throw "Cant find $dir_name$shortver"
+  }
+
+  mkdir "C:\avvm\$name\$version\$platform" -Force > $null
+
+  Write-Output "Looking for C:\$name$shortver-x64 .."
+
+  $dir = ''
+  if (Test-Path "C:\$dir_name$shortver-x64") {
+    if ($platform -eq "x64") {
+      $dir = "C:\$dir_name$shortver-x64"
+    }
+    else {
+      $dir = "C:\$dir_name$shortver"
+    }
+  }
+
+  # TODO: Re-arrange to look only for the needed platform
+  if (! $dir) {
+    Write-Output "Looking for C:\$dir_name$shortver-x86 .."
+  }
+
+  if ((!($dir)) -and (Test-Path "C:\$dir_name$shortver-x86")) {
+    if ($platform -eq "x86") {
+      $dir = "C:\$dir_name$shortver-x86"
+    }
+    else {
+      $dir = "C:\$dir_name$shortver"
+    }
+  }
+
+  if (!($dir)) {
+    throw 'couldnt find x86/x64 directories for $name'
+  }
+
+  if (!( Test-Path $dir)) {
+    throw "Cant find $dir"
+  }
+
+  Write-Output "Coping $dir to C:\avvm\$name\$version\$platform\$name ..."
+
+  # Copy-Item -Path $dir -destination "C:\avvm\$name\$version\$platform\$name" -Recurse -Container
+  move $dir "C:\avvm\$name\$version\$platform\$name"
+
+  $files_content = ('$files = @{ "' + $name + '" = "C:\' + $name + '" }')
+  $files_path = "C:\avvm\$name\$version\$platform\files.ps1"
+
+  Write-Output "Creating $files_path"
+
+  Set-Content $files_path $files_content
+}
+
+function Setup-Preinstalled
+{
+  $env:AVVM_DOWNLOAD_URL = '../../avvm/'
+  Set-ItemProperty -path 'HKCU:\Environment' -name 'AVVM_DOWNLOAD_URL' -value $env:AVVM_DOWNLOAD_URL
+
+  # node already set to 8.x
+  SetInstalledProductVersion go 1.12.3 x64
+
+  SetInstalledProductVersion miniconda 2.7.15 x86
+  SetInstalledProductVersion miniconda3 3.7.0 x86
+  SetInstalledProductVersion perl 5.20.1.2000 x86
+}
+
+function Setup-Products
+{
+  param (
+    [array]
+    $Packages
+  )
+  Setup-Preinstalled
+
+  foreach ($pkg in $Packages)
+  {
+    $name = $pkg.name
+    $version = $pkg.version
+
+    if ($name -eq 'StrawberryPerl') {
+      # Could be mapped to 'perl', but they are slightly different
+      continue
+    }
+
+    if ($name -eq 'nodejs') {
+      $name = 'node'
+    }
+    elseif ($name -eq 'golang') {
+      $name = 'go'
+    }
+    elseif ($name -eq 'miniconda3') {
+      $name = 'miniconda'
+    }
+
+    if ($name -eq 'python') {
+      if ($env:PYTHON_VERSION) {
+        $version = $env:PYTHON_VERSION
+      }
+    }
+
+    if ($name -eq 'miniconda')
+    {
+      # TODO improve translation of real miniconda versions
+      # into AppVeyor versions which are the python version
+      if ($version -eq '4.5.12') {
+        $version = '3.7'
+      }
+
+      if ($version[0] -eq '2') {
+        Write-Output "Moving C:\Miniconda(-x64) to C:\Miniconda27(-x64)"
+        move C:\Miniconda C:\Miniconda27
+        move C:\Miniconda-x64 C:\Miniconda27-x64
+      }
+    }
+
+    Add-Product $name $version $env:PLATFORM
+    Install-Product $name $version $env:PLATFORM
+  }
+}
diff --git a/.ci/appveyor.yml b/.ci/appveyor.yml
index 92a5263a6a..eb368050e6 100644
--- a/.ci/appveyor.yml
+++ b/.ci/appveyor.yml
@@ -1,100 +1,144 @@
 environment:
-  nodejs_version: "10"
   global:
     # SDK v7.0 MSVC Express 2008's SetEnv.cmd script will fail if the
     # /E:ON and /V:ON options are not enabled in the batch script intepreter
     # See: http://stackoverflow.com/a/13751649/163740
     CMD_IN_ENV: "cmd /E:ON /V:ON /C .\\.ci\\run_with_env.cmd"
     PIP_CACHE_DIR: C:\pip_cache
-    GOPATH: c:\gopath
-    PERLPATH: C:\strawberry\c\bin;C:\strawberry\perl\bin
-    PERLSITEPATH: C:\strawberry\perl\site\bin
+    NUGET_EXE_NO_PROMPT: 1
+    NUGET_HTTP_CACHE_PATH: C:\nuget_http_cache
+    CHOCO_CACHE_DIR: C:\choco_cache
+    PLATFORM: $(PLATFORM)
+    MSYS_ROOT: C:\msys64
+    MSYS_BIN: $(MSYS_ROOT)\usr\bin
+    GOPATH: C:\gopath
+    # Override the temp directory to avoid sed escaping issues
+    # See https://github.com/haskell/cabal/issues/5386
+    TMP: c:\tmp
+    # ActiveState Perl needs to be in path before msys' perl
+    PATH: >-
+      C:\python;C:\python\Scripts;$(PATH);$(MSYS_BIN);
+      %USERPROFILE%\.nuget\packages\fudge\1.3.0\tools;
+      $(GOPATH)\bin;
+      $(MSYS_BIN)\core_perl;
+      C:\ruby\bin;
+      C:\miniconda;C:\miniconda\Scripts
 
   matrix:
-    - PYTHON: "C:\\Python36-x64"
-      PYTHON_VERSION: "3.6"
-      PYTHON_ARCH: "64"
-      ruby_version: "24-x64"
-      TOX_APPVEYOR_X64: 1
+    - PYTHON_VERSION: 3.4.4
+    - PYTHON_VERSION: 3.6.8
 
-    - PYTHON: "C:\\Python36"
-      PYTHON_VERSION: "3.6"
-      PYTHON_ARCH: "32"
-      TOX_APPVEYOR_X64: 0
-      ruby_version: "24"
-
-stack: go 1.10
+platform:
+  - x64
+  - x86
 
 cache:
+  - C:\nuget_http_cache
+  - C:\choco_cache
   - "C:\\pip_cache"
-  - "node_modules"
-  - "C:\\strawberry"
-  - "C:\\Users\\appveyor\\AppData\\Local\\coala-bears\\coala-bears"
   - "C:\\Users\\appveyor\\AppData\\Roaming\\nltk_data"
+  - "%LOCALAPPDATA%\\Composer"
+  - C:\Users\appveyor\AppData\Roaming\cabal\
 
 branches:
   except:
     - /^sils\/.*/
 
 install:
-  # Prepend newly installed Python to the PATH of this build (this cannot be
-  # done from inside the powershell script as it would require to restart
-  # the parent CMD process).
-  - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
-  - "SET PATH=C:\\Program\ Files\\Java\\jdk1.8.0\\bin;%PATH%"
-  - "SET PATH=C:\\gopath\\bin;%PATH%"
-
-  # https://github.com/coala/coala-bears/issues/2908
-  # choco install --ignore-dependencies --yes pmd
-  # Also doesnt work
-  # ps: iex (new-object net.webclient).
-  #     downloadstring('https://tailor.sh/install.ps1')
-
-  - go get -u github.com/alecthomas/gometalinter
-  - gometalinter --install
-  - go get -u github.com/BurntSushi/toml/cmd/tomlv
-  - go get -u sourcegraph.com/sqs/goreturns
-
-  # Default Perl doesnt include cpanm
-  - if not exist "C:\strawberry" choco install strawberryperl -y
-  - set PATH=%PERLPATH%;%PERLSITEPATH%;%PATH%;
-  - cpanm --quiet --installdeps --with-develop --notest .
+  - python --version
+  - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
+  - node --version
+  - which npm
+  - npm --version
+  - npm config get prefix
+  - go version
+  - ruby --version
+
+  - which bower & exit 0
+  - "%MSYS_BIN%\\find.exe C:\\Users\\appveyor\\AppData\\Roaming\\npm"
+
+  - python .ci/fix_path.py
+  - refreshenv
+  - "%MSYS_BIN%\\date.exe"
+  - cp .ci/choco.config C:\ProgramData\chocolatey\config\chocolatey.config
+
+  - nuget install fudge -verbosity quiet
+  - ps: fudge install -FudgefilePath .ci/Fudgefile.appveyor
+  - choco list --local-only
+  - refreshenv
+  - echo %PATH%
 
+  - python --version
+  - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
+  - node --version
+  - which npm
+  - npm --version
+  - npm config get prefix
+  - ruby --version
+  - go version
+  - conda --version
+
+  - ps: fudge install
+  - choco list --local-only
+  - refreshenv
   - echo %PATH%
 
+  - node --version
+  - which npm
+  - npm --version
+  - npm config get prefix
+  - ruby --version
+  - go version
+  - conda --version
+  - R --version
+  - "%MSYS_BIN%\\find.exe C:\\Users\\appveyor\\AppData\\Roaming\\npm"
+  - which bower
+  - bower --version
+
   # Check that we have the expected version and architecture for Python
   - "python --version"
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
-  - "%CMD_IN_ENV% python -m pip install tox-appveyor tox-backticks tox-venv"
-
-  - ps: Install-Product node $env:nodejs_version
-  - "npm config set loglevel warn"
-  - "npm install"
-  - "SET PATH=node_modules\\.bin;%PATH%"
 
-  # Commands for Ruby
-  - "sed -i '/sqlint/d' Gemfile"
-  - "SET PATH=C:\\Ruby%ruby_version%\\bin;%PATH%"
-  - "bundle install"
+  - "%MSYS_BIN%\\date.exe"
+
+  - "%CMD_IN_ENV% python -m pip install --upgrade pip setuptools"
+  - "%CMD_IN_ENV% python -m pip install -r requirements.txt
+    -r test-requirements.txt
+    pytest-spec
+    "
+  - "%MSYS_BIN%\\date.exe"
+
+  # As installation to windows for these requirements are broken.
+  # Tests are still being skipped.
+  - rm
+        dependency_management/requirements/AptRequirement.py
+        dependency_management/requirements/BrewRequirement.py
+        dependency_management/requirements/PkgRequirement.py
+        dependency_management/requirements/PortageRequirement.py
+        dependency_management/requirements/ZypperRequirement.py
+        dependency_management/requirements/DnfRequirement.py
+        dependency_management/requirements/YumRequirement.py
+        tests/AptRequirementTest.py
+        tests/BrewRequirementTest.py
+        tests/PkgRequirementTest.py
+        tests/PortageRequirementTest.py
+        tests/ZypperRequirementTest.py
+        tests/DnfRequirementTest.py
+        tests/YumRequirementTest.py
 
 build: false  # Not a C# project, build stuff at the test step instead.
 
 test_script:
-  # Force DOS format, as Checkstyle configs enable NewlineAtEndOfFile,
-  # which defaults to CRLF on Windows, and Appveyor CI ignores .gitattributes
-  # http://help.appveyor.com/discussions/problems/5687-gitattributes-changes-dont-have-any-effect
-  - unix2dos tests/java/test_files/CheckstyleGood.java
-  # Clang DLLs x64 were nowadays installed, but the x64 version hangs, so we
-  # exclude according tests. See https://github.com/appveyor/ci/issues/495 and
-  # https://github.com/appveyor/ci/issues/688
-  - set TOXENV=py36-noreqs-pip-npm-gem-go-perl-java8-win-check-noskip-codecov
-  - "sed -i 's/^envlist.*$/envlist: %TOXENV%/' tox.ini"
-  - "%CMD_IN_ENV% python -m tox"
-  # "%CMD_IN_ENV% python setup.py install"
-  # "%CMD_IN_ENV% python -m pip install \
-  # git+https://github.com/coala/coala"
-  # sed -i '/ShellCheckBear/d' .coafile
-  # "%CMD_IN_ENV% coala --ci"
+  - "%CMD_IN_ENV% python setup.py install"
+  - "%CMD_IN_ENV% py.test --cov-fail-under=100"
+  - "%CMD_IN_ENV% pip install coala-bears"
+  - "%CMD_IN_ENV% coala --ci"
+
+on_success:
+  - codecov
+
+on_failure:
+  - codecov & exit 0
 
 matrix:
   fast_finish: true
diff --git a/.ci/choco.config b/.ci/choco.config
new file mode 100644
index 0000000000..026715ec07
--- /dev/null
+++ b/.ci/choco.config
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<chocolatey xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<!--
+  # This doesnt work as php has an error in dependency KB3035131
+  # choco feature enable -n=stopOnFirstPackageFailure
+  # Ways to see the final config
+  # choco config list
+  # choco feature list
+-->
+  <config>
+    <add key="cacheLocation" value="C:\choco_cache" description="Cache location if not TEMP folder. Replaces `$env:TEMP` value for choco.exe process. It is highly recommended this be set to make Chocolatey more deterministic in cleanup." />
+    <add key="containsLegacyPackageInstalls" value="true" description="Install has packages installed prior to 0.9.9 series." />
+    <add key="commandExecutionTimeoutSeconds" value="2700" description="Default timeout for command execution. '0' for infinite (starting in 0.10.4)." />
+    <add key="proxy" value="" description="Explicit proxy location. Available in 0.9.9.9+." />
+    <add key="proxyUser" value="" description="Optional proxy user. Available in 0.9.9.9+." />
+    <add key="proxyPassword" value="" description="Optional proxy password. Encrypted. Available in 0.9.9.9+." />
+    <add key="webRequestTimeoutSeconds" value="30" description="Default timeout for web requests. Available in 0.9.10+." />
+    <add key="proxyBypassList" value="" description="Optional proxy bypass list. Comma separated. Available in 0.10.4+." />
+    <add key="proxyBypassOnLocal" value="true" description="Bypass proxy for local connections. Available in 0.10.4+." />
+    <add key="upgradeAllExceptions" value="" description="A comma-separated list of package names that should not be upgraded when running `choco upgrade all'. Defaults to empty. Available in 0.10.14+." />
+    <add key="trace" value="on" />
+    <add key="debug" value="on" />
+    <add key="verbose" value="on" />
+    <add key="failonstderr" value="on" />
+  </config>
+  <sources>
+    <source id="chocolatey" value="https://chocolatey.org/api/v2/" disabled="false" bypassProxy="false" selfService="false" adminOnly="false" priority="0" />
+  </sources>
+  <features>
+    <feature name="checksumFiles" enabled="true" setExplicitly="false" description="Checksum files when pulled in from internet (based on package)." />
+    <feature name="autoUninstaller" enabled="true" setExplicitly="false" description="Uninstall from programs and features without requiring an explicit uninstall script." />
+    <feature name="allowGlobalConfirmation" enabled="true" setExplicitly="true" description="Prompt for confirmation in scripts or bypass." />
+    <feature name="failOnAutoUninstaller" enabled="false" setExplicitly="false" description="Fail if automatic uninstaller fails." />
+    <feature name="failOnStandardError" enabled="false" setExplicitly="true" description="Fail if install provider writes to stderr. Not recommended for use. Available in 0.9.10+." />
+    <feature name="powershellHost" enabled="true" setExplicitly="false" description="Use Chocolatey's built-in PowerShell host. Available in 0.9.10+." />
+    <feature name="logEnvironmentValues" enabled="true" setExplicitly="true" description="Log Environment Values - will log values of environment before and after install (could disclose sensitive data). Available in 0.9.10+." />
+    <feature name="virusCheck" enabled="false" setExplicitly="false" description="Virus Check - perform virus checking on downloaded files. Available in 0.9.10+. Licensed versions only." />
+    <feature name="failOnInvalidOrMissingLicense" enabled="false" setExplicitly="false" description="Fail On Invalid Or Missing License - allows knowing when a license is expired or not applied to a machine. Available in 0.9.10+." />
+    <feature name="ignoreInvalidOptionsSwitches" enabled="true" setExplicitly="true" description="Ignore Invalid Options/Switches - If a switch or option is passed that is not recognized, should choco fail? Available in 0.9.10+." />
+    <feature name="usePackageExitCodes" enabled="false" setExplicitly="false" description="Use Package Exit Codes - Package scripts can provide exit codes. With this on, package exit codes will be what choco uses for exit when non-zero (this value can come from a dependency package). Chocolatey defines valid exit codes as 0, 1605, 1614, 1641, 3010. With this feature off, choco will exit with 0, 1, or -1 (matching previous behavior). Available in 0.9.10+." />
+    <feature name="useFipsCompliantChecksums" enabled="false" setExplicitly="false" description="Use FIPS Compliant Checksums - Ensure checksumming done by choco uses FIPS compliant algorithms. Not recommended unless required by FIPS Mode. Enabling on an existing installation could have unintended consequences related to upgrades/uninstalls. Available in 0.9.10+." />
+    <feature name="allowEmptyChecksums" enabled="false" setExplicitly="false" description="Allow packages to have empty/missing checksums for downloaded resources from non-secure locations (HTTP, FTP). Enabling is not recommended if using sources that download resources from the internet. Available in 0.10.0+." />
+    <feature name="allowEmptyChecksumsSecure" enabled="true" setExplicitly="false" description="Allow packages to have empty/missing checksums for downloaded resources from secure locations (HTTPS). Available in 0.10.0+." />
+    <feature name="scriptsCheckLastExitCode" enabled="false" setExplicitly="false" description="Scripts Check $LastExitCode (external commands) - Leave this off unless you absolutely need it while you fix your package scripts  to use `throw 'error message'` or `Set-PowerShellExitCode #` instead of `exit #`. This behavior started in 0.9.10 and produced hard to find bugs. If the last external process exits successfully but with an exit code of not zero, this could cause hard to detect package failures. Available in 0.10.3+. Will be removed in 0.11.0." />
+    <feature name="showNonElevatedWarnings" enabled="true" setExplicitly="false" description="Show Non-Elevated Warnings - Display non-elevated warnings. Available in 0.10.4+." />
+    <feature name="showDownloadProgress" enabled="false" setExplicitly="true" description="Show Download Progress - Show download progress percentages in the CLI. Available in 0.10.4+." />
+    <feature name="stopOnFirstPackageFailure" enabled="false" setExplicitly="false" description="Stop On First Package Failure - Stop running install, upgrade or uninstall on first package failure instead of continuing with others. As this will affect upgrade all, it is normally recommended to leave this off. Available in 0.10.4+." />
+    <feature name="useRememberedArgumentsForUpgrades" enabled="false" setExplicitly="false" description="Use Remembered Arguments For Upgrades - When running upgrades, use arguments for upgrade that were used for installation ('remembered'). This is helpful when running upgrade for all packages. Available in 0.10.4+. This is considered in preview for 0.10.4 and will be flipped to on by default in a future release." />
+    <feature name="ignoreUnfoundPackagesOnUpgradeOutdated" enabled="false" setExplicitly="false" description="Ignore Unfound Packages On Upgrade Outdated - When checking outdated or upgrades, if a package is not found against sources specified, don't report the package at all. Available in 0.10.9+." />
+    <feature name="removePackageInformationOnUninstall" enabled="false" setExplicitly="false" description="Remove Stored Package Information On Uninstall - When a package is uninstalled, should the stored package information also be removed?  Available in 0.10.9+." />
+    <feature name="logWithoutColor" enabled="true" setExplicitly="true" description="Log without color - Do not show colorization in logging output. Available in 0.10.9+." />
+    <feature name="useEnhancedExitCodes" enabled="true" setExplicitly="true" description="Use Enhanced Exit Codes - Chocolatey is able to provide enhanced exit codes surrounding list, search, info, outdated and other commands that don't deal directly with package operations. To see enhanced exit codes and their meanings, please run `choco [cmdname] -?`. With this feature off, choco will exit with 0, 1, or -1  (matching previous behavior). Available in 0.10.12+." />
+    <feature name="exitOnRebootDetected" enabled="false" setExplicitly="false" description="Exit On Reboot Detected - Stop running install, upgrade, or uninstall when a reboot request is detected. Requires 'usePackageExitCodes' feature to be turned on. Will exit with either 350 or 1604. When it exits with 350, it means pending reboot discovered prior to running operation. When it exits with 1604, it means some work completed prior to reboot request being detected. Available in 0.10.12+." />
+    <feature name="skipPackageUpgradesWhenNotInstalled" enabled="false" setExplicitly="false" description="Skip Packages Not Installed During Upgrade - if a package is not installed, do not install it during the upgrade process. Available in 0.10.12+." />
+    <feature name="logValidationResultsOnWarnings" enabled="true" setExplicitly="false" description="Log validation results on warnings - Should the validation results be logged if there are warnings? Available in 0.10.12+." />
+    <feature name="usePackageRepositoryOptimizations" enabled="true" setExplicitly="false" description="Use Package Repository Optimizations - Turn on optimizations for reducing bandwidth with repository queries during package install/upgrade/outdated operations. Should generally be left enabled, unless a repository needs to support older methods of query. When disabled, this makes queries similar to the way they were done in Chocolatey v0.10.11 and before. Available in 0.10.14+." />
+  </features>
+  <apiKeys />
+</chocolatey>
diff --git a/.ci/fix_path.py b/.ci/fix_path.py
new file mode 100644
index 0000000000..834dd24b4f
--- /dev/null
+++ b/.ci/fix_path.py
@@ -0,0 +1,77 @@
+import os
+
+KEY = 'System\CurrentControlSet\Control\Session Manager\Environment'
+
+DISCARD_KEYWORDS = tuple([
+   'awscli',
+   'azure',
+   'coverity',
+   'dnvm',
+   'mspec',
+   'nunit',
+   'odbc',
+   'privateassemblies',
+   'python27',
+   'ruby193',
+   'service fabric',
+   'sql',
+   'subversion',
+   'testwindow',
+   'xunit',
+])
+
+# TODOs:
+# - Also get raw unexpanded values from registry to reduce length, and
+#   merge them with the current PATH which AppVeyor has populated
+# - also fetch and filter user env vars, also de-duplicate wrt system vars
+#   (see https://github.com/reider-roque/pathvar)
+# - Replace \\ and \.\ with \
+
+
+def get_tidy_path(original):
+    parts = []
+    dups = set()
+    discard_matches = set()
+
+    for part in original.split(';'):
+        # This will break directories with a trailing space
+        part = part.strip().rstrip('\\')
+        if part in parts:
+            dups.add(part)
+            continue
+
+        part_lower = part.lower()
+        for word in DISCARD_KEYWORDS:
+            if word in part_lower:
+                discard_matches.add(word)
+                break
+        else:
+            parts.append(part)
+
+    if dups:
+        print('Discarded dups:\n  {}'.format('\n  '.join(sorted(dups))))
+
+    if discard_matches:
+        print('Discarded keyword matches: '
+              '{}'.format(', '.join(sorted(discard_matches))))
+
+    return ';'.join(parts)
+
+
+def set_path_in_registry(value):
+    try:
+        import winreg
+    except ImportError:
+        import _winreg as winreg
+
+    reg = winreg.ConnectRegistry(None, winreg.HKEY_LOCAL_MACHINE)
+    with winreg.OpenKey(reg, KEY, 0, winreg.KEY_ALL_ACCESS) as regkey:
+        winreg.SetValueEx(regkey, 'Path', 0, winreg.REG_EXPAND_SZ, value)
+
+
+
+if __name__ == '__main__':
+    original = os.environ['PATH']
+    value = get_tidy_path(original)
+    print('PATH (len %d) set to:\n%s' % (len(value), value))
+    set_path_in_registry(value)
diff --git a/.ci/nuspecs/template.nuspec.in b/.ci/nuspecs/template.nuspec.in
new file mode 100644
index 0000000000..f056732a6d
--- /dev/null
+++ b/.ci/nuspecs/template.nuspec.in
@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+  <metadata>
+    <id>{name}</id>
+    <version>{version}</version>
+    <title>{name} {version}</title>
+    <authors>{name}</authors>
+    <owners>appveyor</owners>
+    <licenseUrl>https://www.python.org/download/releases/3.4.0/license</licenseUrl>
+    <projectUrl>http://www.python.org/</projectUrl>
+    <iconUrl>https://cdn.jsdelivr.net/gh/chocolatey/chocolatey-coreteampackages@edba4a5849ff756e767cba86641bea97ff5721fe/icons/python.svg</iconUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <description>.</description>
+    <summary>.</summary>
+    <tags>python programming development foss cross-platform admin</tags>
+    <dependencies>
+      <dependency id="chocolatey"/>
+    </dependencies>
+  </metadata>
+</package>
diff --git a/Fudgefile b/Fudgefile
new file mode 100644
index 0000000000..4873e3c9d0
--- /dev/null
+++ b/Fudgefile
@@ -0,0 +1,28 @@
+{
+    "scripts": {
+        "pre": {
+            "install": ". .ci/FudgePostInstall.ps1; Update-SessionEnvironment"
+        },
+        "post": {
+            "install": ". .ci/FudgePostInstall.ps1; Fixes"
+        }
+    },
+    "packages": [
+        { "name": "msys2", "params": "/InstallDir:C:\\msys64 /NoUpdate" },
+        { "name": "python", "version": "3.6.8" },
+        { "name": "ruby", "version": "2.6.1.1" },
+        { "name": "StrawberryPerl", "version": "5.28.0.1" },
+        { "name": "nodejs", "version": "11.13.0" },
+        { "name": "golang", "version": "1.9.7" },
+        { "name": "miniconda3", "version": "4.5.12" },
+        { "name": "php" },
+        { "name": "ghc" },
+        { "name": "bower" },
+        { "name": "composer" },
+        { "name": "julia" },
+        { "name": "haskell-stack" },
+        { "name": "luarocks" },
+        { "name": "R.project" },
+        { "name": "rust" }
+    ]
+}