diff --git a/pkgs/gpi-2/default.nix b/pkgs/gpi-2/default.nix
index a885e02..0e5d0d1 100644
--- a/pkgs/gpi-2/default.nix
+++ b/pkgs/gpi-2/default.nix
@@ -17,6 +17,7 @@ stdenv.mkDerivation rec {
   src = builtins.fetchGit {
     url = "ssh://git@bscpm03.bsc.es/interoperability/GPI-2";
     ref = "refs/tags/tagaspi-2021.11";
+    rev = "9082fe7770fa9f6acba1b1ac938ad209a3d09477";
   };
 
   enableParallelBuilding = true;
diff --git a/pkgs/tagaspi/default.nix b/pkgs/tagaspi/default.nix
index 9d9395c..fbeac55 100644
--- a/pkgs/tagaspi/default.nix
+++ b/pkgs/tagaspi/default.nix
@@ -39,7 +39,8 @@ stdenv.mkDerivation rec {
 
   src = builtins.fetchGit {
     url = "ssh://git@bscpm03.bsc.es/interoperability/tagaspi";
-    ref = "master";
+    ref = "refs/tags/2021.11";
+    rev = "5aabb1849de2e512cc8729f32783051ecd4cab97";
   };
 
   hardeningDisable = [ "all" ];