diff --git a/pkgs/development/libraries/aterm/2.5.nix b/pkgs/development/libraries/aterm/2.5.nix
index 097d616d9888..daaf6fdd584d 100644
--- a/pkgs/development/libraries/aterm/2.5.nix
+++ b/pkgs/development/libraries/aterm/2.5.nix
@@ -1,7 +1,7 @@
 {stdenv, fetchurl}:
 
 stdenv.mkDerivation {
-  name = "aterm-2.5";
+  name = "aterm-2.5-r21238";
 
   src = fetchurl {
     url = http://buildfarm.st.ewi.tudelft.nl/releases/meta-environment/aterm-2.5pre21238-l2q7rg38/aterm-2.5.tar.gz;