diff --git a/pkgs/build-support/release/default.nix b/pkgs/build-support/release/default.nix
index f90c56fbc8e..e26c9d7e88b 100644
--- a/pkgs/build-support/release/default.nix
+++ b/pkgs/build-support/release/default.nix
@@ -4,8 +4,10 @@ with pkgs;
 
 rec {
 
-  makeSourceTarball = args: import ./make-source-tarball.nix
-    ({inherit stdenv autoconf automake libtool;} // args);
+  makeSourceTarball = args: import ./make-source-tarball.nix (
+    { inherit autoconf automake libtool;
+      stdenv = stdenvNew;
+    } // args);
 
   nixBuild = args: import ./nix-build.nix (
     { inherit stdenv;
diff --git a/pkgs/build-support/release/make-source-tarball.nix b/pkgs/build-support/release/make-source-tarball.nix
index e92ad2dea10..3a5123ce3f8 100644
--- a/pkgs/build-support/release/make-source-tarball.nix
+++ b/pkgs/build-support/release/make-source-tarball.nix
@@ -34,7 +34,8 @@ stdenv.mkDerivation (
 
     showBuildStats = true;
 
-    phases = "unpackPhase patchPhase autoconfPhase configurePhase buildPhase installPhase checkPhase distPhase";
+    preConfigurePhases = "autoconfPhase";
+    postPhases = "finalPhase";
   }
 
   # Then, the caller-supplied attributes.
@@ -84,7 +85,7 @@ stdenv.mkDerivation (
     # Cause distPhase to copy tar.bz2 in addition to tar.gz.
     tarballs = "*.tar.gz *.tar.bz2";
 
-    postDist = ''
+    finalPhase = ''
       shopt -s nullglob
       for i in $out/tarballs/*; do
         echo "file source-dist $i" >> $out/nix-support/hydra-build-products