diff --git a/pkgs/applications/science/astronomy/gildas/default.nix b/pkgs/applications/science/astronomy/gildas/default.nix
index 4734e6e3316..7ede379fb49 100644
--- a/pkgs/applications/science/astronomy/gildas/default.nix
+++ b/pkgs/applications/science/astronomy/gildas/default.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   name = "gildas-${version}";
 
   src = fetchurl {
-    url = "http://www.iram.fr/~gildas/dist/gildas-src-${srcVersion}.tar.gz";
+    url = "http://www.iram.fr/~gildas/dist/archive/gildas/gildas-src-${srcVersion}.tar.gz";
     sha256 = "0kl3zf6b1kv8hgsfrarsnm2gnrdax3vi8f856249y4nxsa7lbv2i";
   };