System Gen121 @ 2025-12-12-19:47:19 by jonas@monolith

fixes/plasma-fix.nix

@@ -0,0 +1,57 @@
+# https://github.com/NixOS/nixpkgs/issues/126590#issuecomment-3194531220
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: {
+  nixpkgs.overlays = lib.singleton (final: prev: {
+    kdePackages =
+      prev.kdePackages
+      // {
+        plasma-workspace = let
+          # the package we want to override
+          basePkg = prev.kdePackages.plasma-workspace;
+
+          # a helper package that merges all the XDG_DATA_DIRS into a single directory
+          xdgdataPkg = pkgs.stdenv.mkDerivation {
+            name = "${basePkg.name}-xdgdata";
+            buildInputs = [basePkg];
+            dontUnpack = true;
+            dontFixup = true;
+            dontWrapQtApps = true;
+            installPhase = ''
+              mkdir -p $out/share
+              ( IFS=:
+                for DIR in $XDG_DATA_DIRS; do
+                  if [[ -d "$DIR" ]]; then
+                    cp -r $DIR/. $out/share/
+                    chmod -R u+w $out/share
+                  fi
+                done
+              )
+            '';
+          };
+
+          # undo the XDG_DATA_DIRS injection that is usually done in the qt wrapper
+          # script and instead inject the path of the above helper package
+          derivedPkg = basePkg.overrideAttrs {
+            preFixup = ''
+              for index in "''${!qtWrapperArgs[@]}"; do
+                if [[ ''${qtWrapperArgs[$((index+0))]} == "--prefix" ]] && [[ ''${qtWrapperArgs[$((index+1))]} == "XDG_DATA_DIRS" ]]; then
+                  unset -v "qtWrapperArgs[$((index+0))]"
+                  unset -v "qtWrapperArgs[$((index+1))]"
+                  unset -v "qtWrapperArgs[$((index+2))]"
+                  unset -v "qtWrapperArgs[$((index+3))]"
+                fi
+              done
+              qtWrapperArgs=("''${qtWrapperArgs[@]}")
+              qtWrapperArgs+=(--prefix XDG_DATA_DIRS : "${xdgdataPkg}/share")
+              qtWrapperArgs+=(--prefix XDG_DATA_DIRS : "$out/share")
+            '';
+          };
+        in
+          derivedPkg;
+      };
+  });
+}

flake.nix

@@ -85,7 +85,13 @@
           isHM = false;
         };
         modules = [
-          ({...}: {nixpkgs.overlays = [overlay-unstable self.overlays.default audio.overlays.default];})
+          ({...}: {
+            nixpkgs.overlays = [
+              overlay-unstable
+              self.overlays.default
+              audio.overlays.default
+            ];
+          })
           ({...}: {
             nixpkgs.config.allowUnfree = true;
             nixpkgs.config.nvidia.acceptLicense = true;
@@ -99,6 +105,7 @@
           nixos-hardware.nixosModules.lenovo-thinkpad-t14-amd-gen1
           inputs.sops-nix.nixosModules.sops
           nixos-cosmic.nixosModules.default
+          ./fixes/plasma-fix.nix
           ./modules
           ./hosts/monolith/configuration.nix
         ];