buildGo{module,package}: also fixup `$out/{libexec,lib}`

also suppresses errors if those directories are not present

pkgs/development/go-modules/generic/default.nix

@@ -235,7 +235,7 @@ let
     '';
 
     preFixup = (args.preFixup or "") + ''
-      find $out/bin -type f -exec ${removeExpr removeReferences} '{}' + || true
+      find $out/{bin,libexec,lib} -type f 2>/dev/null | xargs -r ${removeExpr removeReferences} || true
     '';
 
     strictDeps = true;

pkgs/development/go-packages/generic/default.nix

@@ -211,8 +211,7 @@ let
     '';
 
     preFixup = preFixup + ''
-      find $out/bin -type f -exec ${removeExpr removeReferences} '{}' + || true
-      find $out/libexec -type f -exec ${removeExpr removeReferences} '{}' + || true
+      find $out/{bin,libexec,lib} -type f 2>/dev/null | xargs -r ${removeExpr removeReferences} || true
     '';
 
     strictDeps = true;