krebs builders: turn file into module

krebs/5pkgs/builders.nix

@@ -1,8 +1,9 @@
-{ config, pkgs, ... }:
+{ pkgs, ... }:
 with import <stockholm/lib>;
-rec {
+{
+  nixpkgs.config.packageOverrides = _: {
     execve = name: { filename, argv ? null, envp ? {}, destination ? "" }: let
-  in writeC name { inherit destination; } /* c */ ''
+    in pkgs.writeC name { inherit destination; } /* c */ ''
       #include <unistd.h>
 
       static char *const filename = ${toC filename};
@@ -26,7 +27,8 @@ rec {
       }
     '';
 
-  execveBin = name: cfg: execve name (cfg // { destination = "/bin/${name}"; });
+    execveBin = name: cfg:
+      pkgs.execve name (cfg // { destination = "/bin/${name}"; });
 
     makeScriptWriter = interpreter: name: text:
       assert (with types; either absolute-pathname filename).check name;
@@ -66,7 +68,7 @@ rec {
       strip --strip-unneeded "$exe"
     '';
 
-  writeDash = makeScriptWriter "${pkgs.dash}/bin/dash";
+    writeDash = pkgs.makeScriptWriter "${pkgs.dash}/bin/dash";
 
     writeDashBin = name:
       assert types.filename.check name;
@@ -289,5 +291,6 @@ rec {
       cp src.py "$out"
     '';
 
-  writeSed = makeScriptWriter "${pkgs.gnused}/bin/sed -f";
+    writeSed = pkgs.makeScriptWriter "${pkgs.gnused}/bin/sed -f";
+  };
 }

krebs/5pkgs/default.nix

@@ -1,6 +1,9 @@
 { config, lib, pkgs, ... }@args:
 with import <stockholm/lib>;
 {
+  imports = [
+    ./builders.nix
+  ];
   nixpkgs.config.packageOverrides = oldpkgs: let
 
     # This callPackage will try to detect obsolete overrides.
@@ -15,7 +18,6 @@ with import <stockholm/lib>;
       else override;
 
   in {}
-  // import ./builders.nix args
   // mapAttrs (_: flip callPackage {})
               (filterAttrs (_: dir: pathExists (dir + "/default.nix"))
                            (subdirsOf ./.))