chore(nix-patches): Add helper function

hive.nix

@@ -2,10 +2,8 @@ let
   sources' = import ./npins;
 
   # Patch sources directly
-  sources = builtins.mapAttrs (
-    name: src:
-    (patch.base { pkgs = import sources'.nixos-unstable { }; }).applyPatches { inherit name src; }
-  ) sources';
+  sources = builtins.mapAttrs (patch.base { pkgs = import sources'.nixos-unstable { }; })
+    .applyPatches' sources';
 
   lib = import (sources.nix-lib + "/src/trivial.nix");
 

lib/nix-patches/default.nix

@@ -37,20 +37,15 @@
 rec {
   base =
     { pkgs }:
-
-    let
-      inherit (pkgs.lib) fakeHash optionalAttrs;
-    in
-
     rec {
       mkUrlPatch =
         attrs:
         pkgs.fetchpatch (
           {
-            hash = fakeHash;
+            hash = pkgs.lib.fakeHash;
           }
           // attrs
-          // (optionalAttrs (excludeGitHubManual && !(builtins.hasAttr "includes" attrs)) {
+          // (pkgs.lib.optionalAttrs (excludeGitHubManual && !(builtins.hasAttr "includes" attrs)) {
             excludes = (attrs.excludes or [ ]) ++ [ "nixos/doc/manual/*" ];
           })
         );
@@ -107,6 +102,8 @@ rec {
 
             name = "${name}-patched";
           };
+
+      applyPatches' = name: src: applyPatches { inherit name src; };
     };
 
   mkNixpkgsSrc = { src, name }: (base { pkgs = import src { }; }).applyPatches { inherit src name; };