feat(flake): add module for overlays

modules/profiles/base.nix

@@ -1,6 +1,7 @@
 { config
 , lib
 , pkgs
+, inputs
 , ...
 }:
 
@@ -88,6 +89,95 @@ in
   time.timeZone = "Europe/Berlin";
 
   my = {
+    nixpkgs = {
+      overlays = [
+        (_: prev:
+          {
+            nur = import inputs.nur {
+              pkgs = prev;
+              nurpkgs = prev;
+            };
+          }
+        )
+        (
+          final: _:
+
+            with final.lib;
+            rec {
+              fishFile =
+                { name
+                , destination
+                , content
+                , checkPhase ? null
+                }:
+                final.writeTextFile {
+                  inherit name destination;
+                  executable = true;
+                  allowSubstitutes = true;
+                  preferLocalBuild = false;
+                  text = ''
+                    #!${getExe final.fish}
+
+                    ${content}
+                  '';
+
+                  checkPhase =
+                    if checkPhase == null then ''
+                      runHook preCheck
+                      ${getExe final.fish} -n "$target"
+                      runHook postCheck
+                    ''
+                    else checkPhase;
+                };
+
+              writeFishApplication =
+                { name
+                , text
+                , completions ? null
+                , runtimeInputs ? [ ]
+                , checkPhase ? null
+                }:
+                let
+                  runtimeHeader = optionalString (runtimeInputs != [ ])
+                    ''export PATH="${makeBinPath runtimeInputs}:$PATH"'';
+
+                  script = fishFile {
+                    inherit checkPhase;
+                    name = "${name}_script";
+                    destination = "/bin/${name}";
+                    content = concatLines [ runtimeHeader text ];
+                  };
+                  completions_file = fishFile {
+                    inherit checkPhase;
+                    name = "${name}_completions";
+                    destination = "/share/fish/vendor_completions.d/${name}.fish";
+                    content = concatLines [ runtimeHeader completions ];
+                  };
+                in
+                final.symlinkJoin {
+                  inherit name;
+                  paths = [
+                    script
+                  ] ++ optional (completions != null) completions_file;
+                };
+            }
+        )
+        (
+          _: prev: {
+            xorg = prev.xorg // {
+              lndir = prev.xorg.lndir.overrideAttrs (_: {
+                meta.mainProgram = "lndir";
+              });
+            };
+          }
+        )
+      ];
+      channels = {
+        master = inputs.master;
+        stable = inputs.stable;
+      };
+    };
+
     bin.enable = true;
     shell = {
       abbreviations = {