3 files changed, 14 insertions, 47 deletions
diff --git a/nixos/modules/config/console.nix b/nixos/modules/config/console.nix
index c5150305bd8..98f942ee63f 100644
--- a/nixos/modules/config/console.nix
+++ b/nixos/modules/config/console.nix
@@ -116,7 +116,11 @@ in
     { console.keyMap = with config.services.xserver;
         mkIf cfg.useXkbConfig
           (pkgs.runCommand "xkb-console-keymap" { preferLocalBuild = true; } ''
-            '${pkgs.ckbcomp}/bin/ckbcomp' -model '${xkbModel}' -layout '${layout}' \
+            '${pkgs.ckbcomp}/bin/ckbcomp' \
+              ${optionalString (config.environment.sessionVariables ? XKB_CONFIG_ROOT)
+                "-I${config.environment.sessionVariables.XKB_CONFIG_ROOT}"
+              } \
+              -model '${xkbModel}' -layout '${layout}' \
               -option '${xkbOptions}' -variant '${xkbVariant}' > "$out"
           '');
     }
diff --git a/nixos/modules/services/x11/extra-layouts.nix b/nixos/modules/services/x11/extra-layouts.nix
index 0e2edc6a530..b1c4e04975f 100644
--- a/nixos/modules/services/x11/extra-layouts.nix
+++ b/nixos/modules/services/x11/extra-layouts.nix
@@ -79,6 +79,10 @@ let
     };
   };
 
+  xkb_patched = pkgs.xorg.xkeyboardconfig_custom {
+    layouts = config.services.xserver.extraLayouts;
+  };
+
 in
 
 {
@@ -114,58 +118,14 @@ in
 
   config = mkIf (layouts != { }) {
 
-    # We don't override xkeyboard_config directly to
-    # reduce the amount of packages to be recompiled.
-    # Only the following packages are necessary to set
-    # a custom layout anyway:
-    nixpkgs.overlays = lib.singleton (self: super: {
-
-      xkb_patched = self.xorg.xkeyboardconfig_custom {
-        layouts = config.services.xserver.extraLayouts;
-      };
-
-      xorg = super.xorg // {
-        xorgserver = super.xorg.xorgserver.overrideAttrs (old: {
-          configureFlags = old.configureFlags ++ [
-            "--with-xkb-bin-directory=${self.xorg.xkbcomp}/bin"
-            "--with-xkb-path=${self.xkb_patched}/share/X11/xkb"
-          ];
-        });
-
-        setxkbmap = super.xorg.setxkbmap.overrideAttrs (old: {
-          postInstall =
-            ''
-              mkdir -p $out/share
-              ln -sfn ${self.xkb_patched}/etc/X11 $out/share/X11
-            '';
-        });
-
-        xkbcomp = super.xorg.xkbcomp.overrideAttrs (old: {
-          configureFlags = [ "--with-xkb-config-root=${self.xkb_patched}/share/X11/xkb" ];
-        });
-
-      };
-
-      ckbcomp = super.ckbcomp.override {
-        xkeyboard_config = self.xkb_patched;
-      };
-
-      xkbvalidate = super.xkbvalidate.override {
-        libxkbcommon = self.libxkbcommon.override {
-          xkeyboard_config = self.xkb_patched;
-        };
-      };
-
-    });
-
     environment.sessionVariables = {
       # runtime override supported by multiple libraries e. g. libxkbcommon
       # https://xkbcommon.org/doc/current/group__include-path.html
-      XKB_CONFIG_ROOT = "${pkgs.xkb_patched}/etc/X11/xkb";
+      XKB_CONFIG_ROOT = "${xkb_patched}/etc/X11/xkb";
     };
 
     services.xserver = {
-      xkbDir = "${pkgs.xkb_patched}/etc/X11/xkb";
+      xkbDir = "${xkb_patched}/etc/X11/xkb";
       exportConfiguration = config.services.xserver.displayManager.startx.enable
         || config.services.xserver.displayManager.sx.enable;
     };
diff --git a/nixos/modules/services/x11/xserver.nix b/nixos/modules/services/x11/xserver.nix
index ad9bd88f98a..ee190ac3cc4 100644
--- a/nixos/modules/services/x11/xserver.nix
+++ b/nixos/modules/services/x11/xserver.nix
@@ -738,6 +738,9 @@ in
       nativeBuildInputs = with pkgs.buildPackages; [ xkbvalidate ];
       preferLocalBuild = true;
     } ''
+      ${optionalString (config.environment.sessionVariables ? XKB_CONFIG_ROOT)
+        "export XKB_CONFIG_ROOT=${config.environment.sessionVariables.XKB_CONFIG_ROOT}"
+      }
       xkbvalidate "$xkbModel" "$layout" "$xkbVariant" "$xkbOptions"
       touch "$out"
     '');