Merge pull request #327815 from rhelmot/fix/freebsd

freebsd.mkDerivation: re-add missing hunk

pkgs/os-specific/bsd/freebsd/pkgs/mkDerivation.nix

@@ -2,8 +2,10 @@
   lib,
   stdenv,
   stdenvNoCC,
+  stdenvNoLibs,
+  overrideCC,
+  buildPackages,
   versionData,
-  writeText,
   patches,
   compatIfNeeded,
   freebsd-lib,
@@ -21,7 +23,15 @@
 lib.makeOverridable (
   attrs:
   let
-    stdenv' = if attrs.noCC or false then stdenvNoCC else stdenv;
+    stdenv' =
+      if attrs.noCC or false then
+        stdenvNoCC
+      else if attrs.noLibc or false then
+        stdenvNoLibs
+      else if attrs.noLibcxx or false then
+        overrideCC stdenv buildPackages.llvmPackages.clangNoLibcxx
+      else
+        stdenv;
   in
   stdenv'.mkDerivation (
     rec {