diff --git a/eng/pipelines/dotnet-buildtools-prereqs-all-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-all-pr.yml
index 9e285a9db..ba314b718 100644
--- a/eng/pipelines/dotnet-buildtools-prereqs-all-pr.yml
+++ b/eng/pipelines/dotnet-buildtools-prereqs-all-pr.yml
@@ -1,5 +1,11 @@
 trigger: none
-pr: none
+pr:
+  branches:
+    include:
+    - main
+  paths:
+    include:
+    - src/*
 
 resources:
   repositories:
@@ -16,7 +22,7 @@ stages:
   parameters:
     internalProjectName: ${{ variables.internalProjectName }}
     publicProjectName: ${{ variables.publicProjectName }}
-    linuxAmdBuildJobTimeout: 360
+    linuxAmdBuildJobTimeout: 480
     linuxArmBuildJobTimeout: 300
     linuxAmd64Pool:
       name: NetCore-Public-XL
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-all.yml b/eng/pipelines/dotnet-buildtools-prereqs-all.yml
index 4161893dd..71ac34ddb 100644
--- a/eng/pipelines/dotnet-buildtools-prereqs-all.yml
+++ b/eng/pipelines/dotnet-buildtools-prereqs-all.yml
@@ -1,4 +1,10 @@
-trigger: none
+trigger:
+  branches:
+    include:
+    - main
+  paths:
+    include:
+    - src/*
 pr: none
 
 resources:
@@ -10,6 +16,8 @@ resources:
 
 variables:
 - template: /eng/pipelines/variables/common.yml@self
+- name: publishEolAnnotations
+  value: true
 
 extends:
   template: /eng/common/templates/1es-official.yml@self
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-almalinux-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-almalinux-pr.yml
deleted file mode 100644
index 36dfc3392..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-almalinux-pr.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/almalinux/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/almalinux/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-almalinux.yml b/eng/pipelines/dotnet-buildtools-prereqs-almalinux.yml
deleted file mode 100644
index e6ff22468..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-almalinux.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/almalinux/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/almalinux/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-alpine-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-alpine-pr.yml
deleted file mode 100644
index 2e209f89a..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-alpine-pr.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/alpine/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/alpine/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
-    linuxArmBuildJobTimeout: 120
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-alpine.yml b/eng/pipelines/dotnet-buildtools-prereqs-alpine.yml
deleted file mode 100644
index d84e43c0b..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-alpine.yml
+++ /dev/null
@@ -1,30 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/alpine/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/alpine/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
-        linuxArmBuildJobTimeout: 120
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-azurelinux-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-azurelinux-pr.yml
deleted file mode 100644
index cded28154..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-azurelinux-pr.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/azurelinux/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/azurelinux/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
-    linuxAmdBuildJobTimeout: 480
-    linuxAmd64Pool:
-      name: NetCore-Public-XL
-      demands: ImageOverride -equals build.Ubuntu.2204.amd64.open
-    customBuildInitSteps:
-    - template: /eng/pipelines/steps/install-cross-build-prereqs.yml
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-azurelinux.yml b/eng/pipelines/dotnet-buildtools-prereqs-azurelinux.yml
deleted file mode 100644
index ee19f8604..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-azurelinux.yml
+++ /dev/null
@@ -1,36 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/azurelinux/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/azurelinux/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
-        linuxAmdBuildJobTimeout: 480
-        linuxAmd64Pool:
-          name: NetCore1ESPool-Internal-XL
-          image: 1es-ubuntu-2204
-          os: linux
-        customBuildInitSteps:
-        - template: /eng/pipelines/steps/install-cross-build-prereqs.yml@self
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-centos-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-centos-pr.yml
deleted file mode 100644
index aab3c1dd0..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-centos-pr.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/centos/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/centos/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
-    linuxAmdBuildJobTimeout: 210
-    linuxArmBuildJobTimeout: 300
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-centos.yml b/eng/pipelines/dotnet-buildtools-prereqs-centos.yml
deleted file mode 100644
index 901cfda90..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-centos.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/centos/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/centos/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
-        linuxAmdBuildJobTimeout: 210
-        linuxArmBuildJobTimeout: 300
-        ${{ if eq(variables['System.TeamProject'], 'internal') }}:
-          customCopyBaseImagesInitSteps:
-          - template: /eng/pipelines/steps/set-base-image-override-options.yml@self
-            parameters:
-              variableName: customCopyBaseImagesArgs
-              dockerfileOs: centos
-              baseOverrideRegistry: $(overrideRegistry) # Comes from DotNet-Docker-Common variable group
-          customBuildInitSteps:
-          - template: /eng/pipelines/steps/set-base-image-override-options.yml@self
-            parameters:
-              variableName: imageBuilderBuildArgs
-              dockerfileOs: centos
-              baseOverrideRegistry: $(overrideRegistry) # Comes from DotNet-Docker-Common variable group
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-debian-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-debian-pr.yml
deleted file mode 100644
index 515b1e701..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-debian-pr.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/debian/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/debian/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-debian.yml b/eng/pipelines/dotnet-buildtools-prereqs-debian.yml
deleted file mode 100644
index ce70ab8ee..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-debian.yml
+++ /dev/null
@@ -1,43 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/debian/*
-
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/debian/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
-        ${{ if eq(variables['System.TeamProject'], 'internal') }}:
-          customCopyBaseImagesInitSteps:
-          - template: /eng/pipelines/steps/set-base-image-override-options.yml@self
-            parameters:
-              variableName: customCopyBaseImagesArgs
-              dockerfileOs: debian
-              baseOverrideRegistry: $(overrideRegistry) # Comes from DotNet-Docker-Common variable group
-          customBuildInitSteps:
-          - template: /eng/pipelines/steps/set-base-image-override-options.yml@self
-            parameters:
-              variableName: imageBuilderBuildArgs
-              dockerfileOs: debian
-              baseOverrideRegistry: $(overrideRegistry) # Comes from DotNet-Docker-Common variable group
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-eng.yml b/eng/pipelines/dotnet-buildtools-prereqs-eng.yml
index b9abf34fe..4864191c8 100644
--- a/eng/pipelines/dotnet-buildtools-prereqs-eng.yml
+++ b/eng/pipelines/dotnet-buildtools-prereqs-eng.yml
@@ -22,6 +22,10 @@ variables:
 - template: /eng/pipelines/variables/common.yml@self
 - name: imageBuilder.pathArgs
   value: --path '*'
+# Since this pipeline is intended to test the infra, we don't want to trim the cached images from the matrix.
+# This enables the entire pipeline to be exercised.
+- name: trimCachedImagesForMatrix
+  value: false
 
 stages:
 - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-fedora-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-fedora-pr.yml
deleted file mode 100644
index b838d3a43..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-fedora-pr.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/fedora/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/fedora/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-fedora.yml b/eng/pipelines/dotnet-buildtools-prereqs-fedora.yml
deleted file mode 100644
index b45e50aa6..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-fedora.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/fedora/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/fedora/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-mariner-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-mariner-pr.yml
deleted file mode 100644
index d193d7d16..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-mariner-pr.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/cbl-mariner/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/cbl-mariner/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
-    linuxAmdBuildJobTimeout: 360
-    linuxAmd64Pool:
-      name: NetCore-Public-XL
-      demands: ImageOverride -equals build.Ubuntu.2204.amd64.open
-    customBuildInitSteps:
-    - template: /eng/pipelines/steps/install-cross-build-prereqs.yml
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-mariner.yml b/eng/pipelines/dotnet-buildtools-prereqs-mariner.yml
deleted file mode 100644
index fd7688b7c..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-mariner.yml
+++ /dev/null
@@ -1,36 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/cbl-mariner/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/cbl-mariner/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
-        linuxAmdBuildJobTimeout: 480
-        linuxAmd64Pool:
-          name: NetCore1ESPool-Internal-XL
-          image: 1es-ubuntu-2204
-          os: linux
-        customBuildInitSteps:
-        - template: /eng/pipelines/steps/install-cross-build-prereqs.yml@self
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-nanoserver-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-nanoserver-pr.yml
deleted file mode 100644
index c423ccbbe..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-nanoserver-pr.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/nanoserver/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/nanoserver/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-nanoserver.yml b/eng/pipelines/dotnet-buildtools-prereqs-nanoserver.yml
deleted file mode 100644
index ab195fad9..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-nanoserver.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/nanoserver/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/nanoserver/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-opensuse-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-opensuse-pr.yml
deleted file mode 100644
index 753af9cb9..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-opensuse-pr.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/opensuse/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/opensuse/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-opensuse.yml b/eng/pipelines/dotnet-buildtools-prereqs-opensuse.yml
deleted file mode 100644
index 437019976..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-opensuse.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/opensuse/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/opensuse/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-raspbian-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-raspbian-pr.yml
deleted file mode 100644
index dfaf258fa..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-raspbian-pr.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/raspbian/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/raspbian/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-raspbian.yml b/eng/pipelines/dotnet-buildtools-prereqs-raspbian.yml
deleted file mode 100644
index 3f47fb977..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-raspbian.yml
+++ /dev/null
@@ -1,30 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/raspbian/*
-
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/raspbian/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-ubuntu-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-ubuntu-pr.yml
deleted file mode 100644
index b2071adfe..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-ubuntu-pr.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/ubuntu/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/ubuntu/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
-    linuxAmdBuildJobTimeout: 300
-    customBuildInitSteps:
-    - template: /eng/pipelines/steps/install-cross-build-prereqs.yml
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-ubuntu.yml b/eng/pipelines/dotnet-buildtools-prereqs-ubuntu.yml
deleted file mode 100644
index 946975701..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-ubuntu.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/ubuntu/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/ubuntu/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
-        linuxAmdBuildJobTimeout: 360
-        customBuildInitSteps:
-        - template: /eng/pipelines/steps/install-cross-build-prereqs.yml@self
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-windowsservercore-pr.yml b/eng/pipelines/dotnet-buildtools-prereqs-windowsservercore-pr.yml
deleted file mode 100644
index 129193d05..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-windowsservercore-pr.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-trigger: none
-pr:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/windowsservercore/*
-
-resources:
-  repositories:
-  - repository: PublicVersionsRepo
-    type: github
-    endpoint: public
-    name: dotnet/versions
-
-variables:
-- template: variables/common.yml
-- name: imageBuilder.pathArgs
-  value: --path 'src/windowsservercore/*'
-
-stages:
-- template: stages/build-test-publish-repo.yml
-  parameters:
-    internalProjectName: ${{ variables.internalProjectName }}
-    publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/dotnet-buildtools-prereqs-windowsservercore.yml b/eng/pipelines/dotnet-buildtools-prereqs-windowsservercore.yml
deleted file mode 100644
index 19c1ac1c0..000000000
--- a/eng/pipelines/dotnet-buildtools-prereqs-windowsservercore.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-trigger:
-  branches:
-    include:
-    - main
-  paths:
-    include:
-    - src/windowsservercore/*
-pr: none
-
-resources:
-  repositories:
-  - repository: InternalVersionsRepo
-    type: github
-    endpoint: dotnet
-    name: dotnet/versions
-
-variables:
-- template: /eng/pipelines/variables/common.yml@self
-- name: imageBuilder.pathArgs
-  value: --path 'src/windowsservercore/*'
-
-extends:
-  template: /eng/common/templates/1es-official.yml@self
-  parameters:
-    stages:
-    - template: /eng/pipelines/stages/build-test-publish-repo.yml@self
-      parameters:
-        internalProjectName: ${{ variables.internalProjectName }}
-        publicProjectName: ${{ variables.publicProjectName }}
diff --git a/eng/pipelines/variables/common.yml b/eng/pipelines/variables/common.yml
index ae825a98b..b9a557e6a 100644
--- a/eng/pipelines/variables/common.yml
+++ b/eng/pipelines/variables/common.yml
@@ -21,6 +21,8 @@ variables:
   value: false
 - name: testScriptPath
   value: ""
+- name: trimCachedImagesForMatrix
+  value: true
 - ${{ if eq(variables['System.TeamProject'], 'internal') }}:
   - name: build.imageBuilderDockerRunExtraOptions
     value: -e DOCKER_REPO=$(acr.server)/$(stagingRepoPrefix)dotnet-buildtools/prereqs