diff --git a/release.nix b/release.nix
index 07fcee25..9e1fa80a 100644
--- a/release.nix
+++ b/release.nix
@@ -41,7 +41,7 @@ rec {
 
     let
 
-      nix = nixUnstable;
+      #nix = nixUnstable;
 
       perlDeps = buildEnv {
         name = "hydra-perl-deps";
@@ -103,8 +103,6 @@ rec {
 
       src = if shell then null else hydraSrc;
 
-      stdenv = overrideCC stdenv gcc6;
-
       buildInputs =
         [ makeWrapper autoconf automake libtool unzip nukeReferences pkgconfig sqlite libpqxx
           gitAndTools.topGit mercurial darcs subversion bazaar openssl bzip2 libxslt