diff --git a/release.nix b/release.nix
index 9d2af8f9..0d9e0419 100644
--- a/release.nix
+++ b/release.nix
@@ -159,7 +159,7 @@ in rec {
 
       hydraPath = lib.makeSearchPath "bin" (
         [ libxslt sqlite subversion openssh nix coreutils findutils
-          gzip bzip2 lzma gnutar unzip git gitAndTools.topGit mercurial darcs gnused graphviz bazaar
+          gzip bzip2 lzma gnutar unzip git gitAndTools.topGit mercurial darcs gnused bazaar
         ] ++ lib.optionals stdenv.isLinux [ rpm dpkg cdrkit ] );
 
       preCheck = ''