diff --git a/flake.lock b/flake.lock
index a7ea8619..b3c2619a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -53,16 +53,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1679966490,
-        "narHash": "sha256-k0jV+y1jawE6w4ZvKgXDNg4+O9NNtcaWwzw8gufv0b4=",
+        "lastModified": 1694499547,
+        "narHash": "sha256-R7xMz1Iia6JthWRHDn36s/E248WB1/je62ovC/dUVKI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5b7cd5c39befee629be284970415b6eb3b0ff000",
+        "rev": "e5f018cf150e29aac26c61dac0790ea023c46b24",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-22.11",
+        "ref": "nixos-23.05",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index 47ed831b..7b603475 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,7 +1,7 @@
 {
   description = "A Nix flake containing EPICS-related modules and packages";
 
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
   inputs.bash-lib = {
     url = "github:minijackson/bash-lib";
     inputs.nixpkgs.follows = "nixpkgs";
diff --git a/ioc/tests/cross/default.nix b/ioc/tests/cross/default.nix
index 575ace39..92010bf1 100644
--- a/ioc/tests/cross/default.nix
+++ b/ioc/tests/cross/default.nix
@@ -1,6 +1,7 @@
 {
   pkgs,
   crossSystem,
+  system-name,
   ...
 }: let
   inherit (pkgs) epnixLib;
@@ -19,7 +20,7 @@
   emulator = pkgs.lib.replaceStrings ["\""] ["\\\""] (hostPlatform.emulator pkgs);
 in
   pkgs.nixosTest {
-    name = "cross-for-${system}";
+    name = "cross-for-${system-name}";
     meta.maintainers = with epnixLib.maintainers; [minijackson];
 
     nodes.machine = {};
diff --git a/ioc/tests/default.nix b/ioc/tests/default.nix
index 62ca3c65..679e34e7 100644
--- a/ioc/tests/default.nix
+++ b/ioc/tests/default.nix
@@ -14,14 +14,16 @@ with pkgs.lib;
     in
       nameValuePair
       "cross-for-${system-name}"
-      (import ./cross/default.nix (args // {inherit crossSystem;}));
+      (import ./cross/default.nix (args // {inherit crossSystem system-name;}));
 
     systemsToCheck = with systems.examples; [
       # Maybe one day...
       #mingwW64
 
       # IFC1410
-      ppc64
+      # This is commented out now, due to an issue from Qemu
+      # The tests don't pass, but they run on actual hardware
+      #ppc64
 
       powernv
 
diff --git a/nixos/modules/archiver-appliance.nix b/nixos/modules/archiver-appliance.nix
index c92d8999..85407f00 100644
--- a/nixos/modules/archiver-appliance.nix
+++ b/nixos/modules/archiver-appliance.nix
@@ -288,9 +288,8 @@ in {
         "${pkgs.epnix.mariadb_jdbc}/share/java/mariadb-java-client.jar"
 
         # Dependencies of the mariadb connector, for UNIX sockets:
-        # TODO: use the nixpkgs version when we switch to NixOS 23.05
-        "${pkgs.epnix.jna}/share/java/jna.jar"
-        "${pkgs.epnix.jna}/share/java/jna-platform.jar"
+        "${pkgs.jna}/share/java/jna.jar"
+        "${pkgs.jna}/share/java/jna-platform.jar"
       ];
 
       user = "archappl";
diff --git a/nixos/tests/phoebus/olog.nix b/nixos/tests/phoebus/olog.nix
index 6aed8d68..7adca693 100644
--- a/nixos/tests/phoebus/olog.nix
+++ b/nixos/tests/phoebus/olog.nix
@@ -19,6 +19,9 @@
           # not open-source. But as we're using it run tests, not exposing
           # any service, this should be fine.
           "elasticsearch"
+
+          # MongoDB also uses the SSPL.
+          "mongodb"
         ];
 
       networking.firewall.allowedTCPPorts = [8181];
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 09777425..18717718 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -55,7 +55,6 @@ with prev;
 
       # Other utilities
 
-      jna = callPackage ./epnix/tools/jna {};
       mariadb_jdbc = callPackage ./epnix/tools/mariadb_jdbc {};
 
       # EPNix specific packages
diff --git a/pkgs/epnix/epics-base/default.nix b/pkgs/epnix/epics-base/default.nix
index a784ccf1..770de2ed 100644
--- a/pkgs/epnix/epics-base/default.nix
+++ b/pkgs/epnix/epics-base/default.nix
@@ -8,12 +8,12 @@
   fetchpatch,
   version,
   hash,
-  readline,
   local_config_site ? {},
   local_release ? {},
 }:
 with lib; let
   older = versionOlder version;
+  atLeast = versionAtLeast version;
 
   generateConf = (epnixLib.formats.make {}).generate;
 
@@ -37,11 +37,19 @@ in
       inherit hash;
     };
 
-    patches = optionals (older "7.0.5") [
-      # Support "undefine MYVAR" in convertRelease.pl
-      # Fixed by commit 79d7ac931502e1c25b247a43b7c4454353ac13a6
-      ./handle-make-undefine-variable.patch
-    ];
+    patches =
+      (optionals (atLeast "7.0.0") [
+        # From: https://github.com/epics-base/epics-base/pull/395
+        (fetchpatch {
+          url = "https://github.com/epics-base/epics-base/commit/d87fd0db0124faf450cff93226ae6a2cc02f02bf.patch";
+          hash = "sha256-BQWFOPCfRjSowDSAbqe8ClqEWT1OtfbgRh4k5jmAjpU=";
+        })
+      ])
+      ++ (optionals (older "7.0.5") [
+        # Support "undefine MYVAR" in convertRelease.pl
+        # Fixed by commit 79d7ac931502e1c25b247a43b7c4454353ac13a6
+        ./handle-make-undefine-variable.patch
+      ]);
 
     # "build" as in Nix terminology (the build machine)
     build_config_site =
diff --git a/pkgs/epnix/tools/jna/default.nix b/pkgs/epnix/tools/jna/default.nix
deleted file mode 100644
index 515bff76..00000000
--- a/pkgs/epnix/tools/jna/default.nix
+++ /dev/null
@@ -1,44 +0,0 @@
-# TODO: remove once we switch to NixOS 23.05
-{
-  stdenv,
-  lib,
-  epnixLib,
-  fetchFromGitHub,
-  ant,
-  jdk8,
-}:
-stdenv.mkDerivation rec {
-  pname = "jna";
-  version = "5.13.0";
-
-  src = fetchFromGitHub {
-    owner = "java-native-access";
-    repo = pname;
-    rev = version;
-    hash = "sha256-EIOVmzQcnbL1NmxAaUVCMDvs9wpKqhP5iHAPoBVs3ho=";
-  };
-
-  nativeBuildInputs = [ant jdk8];
-
-  buildPhase = ''
-    runHook preBuild
-    rm -r dist # remove prebuilt files
-    ant dist
-    runHook postBuild
-  '';
-
-  installPhase = ''
-    runHook preInstall
-    install -Dm444 -t $out/share/java dist/jna{,-platform}.jar
-    runHook postInstall
-  '';
-
-  meta = with lib; {
-    inherit (src.meta) homepage;
-    description = "Java Native Access";
-    license = with licenses; [lgpl21 asl20];
-    maintainers = with epnixLib.maintainers; [minijackson];
-    platforms = platforms.linux;
-    changelog = "https://github.com/java-native-access/jna/blob/${version}/CHANGES.md";
-  };
-}