diff --git a/configure.ac b/configure.ac
index fbe0651d..29a23d68 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,7 @@ LIBS="-L$nix/lib/nix"
 
 AC_CHECK_HEADER([store-api.hh], [:],
   [AC_MSG_ERROR([Nix headers not found; please install Nix or check the `--with-nix' option.])])
-AC_CHECK_LIB([expr], [_ZN3nix17parseExprFromFileERNS_9EvalStateESs], [:],
+AC_CHECK_LIB([expr], [_ZN3nix9EvalState17parseExprFromFileESs], [:],
   [AC_MSG_ERROR([Nix library not found; please install Nix or check the `--with-nix' option.])])
 
 CPPFLAGS="$old_CPPFLAGS"
diff --git a/release.nix b/release.nix
index ef36cb81..85d3c35e 100644
--- a/release.nix
+++ b/release.nix
@@ -54,7 +54,7 @@ rec {
       configureFlags = "--with-nix=${nix}";
 
       buildInputs =
-        [ perl makeWrapper libtool nix unzip nukeReferences pkgconfig boehmgc sqlite git gitAndTools.topGit mercurial subversion bazaar]
+        [ perl makeWrapper libtool nix unzip nukeReferences pkgconfig boehmgc sqlite git gitAndTools.topGit mercurial subversion bazaar ]
         ++ (import ./deps.nix) { inherit pkgs; };
 
       hydraPath = stdenv.lib.concatStringsSep ":" (map (p: "${p}/bin") ( [
@@ -75,10 +75,13 @@ rec {
                 --set NIX_RELEASE ${nix.name}
         done
       ''; # */
+
       LOGNAME="$USER";
+
       meta = {
         description = "Build of Hydra on ${system}";
       };
+
       succeedOnFailure = true;
       keepBuildDirectory = true;
     };