diff --git a/pkgs/by-name/trivial-builders/package.nix b/pkgs/by-name/trivial-builders/package.nix
index 7dffdc484..efa77b6ef 100644
--- a/pkgs/by-name/trivial-builders/package.nix
+++ b/pkgs/by-name/trivial-builders/package.nix
@@ -9,7 +9,7 @@
 }:
 {
   # like `runCommandLocal`, but can be `.overrideAttrs` and supports standard phases/hooks like `postBuild`, etc.
-  runCommandLocalOverridable = name: env: buildPhase: stdenvNoCC.mkDerivation {
+  runCommandLocalOverridable = name: env: buildPhase: stdenvNoCC.mkDerivation ({
     inherit name;
     preferLocalBuild = true;
     dontUnpack = true;
@@ -23,7 +23,7 @@
       "runHook postInstall"
       "runHook postFixup"
     ];
-  };
+  } // env);
   # given some package and a path, extract the item at `${package}/${path}` into
   # its own package, but otherwise keeping the same path.
   # this is done by copying the bits, so as to avoid including the item's neighbors
@@ -50,9 +50,9 @@
     else
       wantMan;
   in
-    runCommandLocalOverridable "${pkg.pname or pkg.name}-${suffix}" {
+    runCommandLocalOverridable "${pkg.pname or pkg.name}-${suffix}" ({
       outputs = [ "out" ] ++ lib.optionals wantMan' [ "man" ];
-    } ''
+    } // args) ''
       tryLink() {
         local srcPath="$1/$2"
         local dirName=$(dirname "$2")