diff --git a/.nix/config.nix b/.nix/config.nix
index 01136b124..3a2811e7b 100644
--- a/.nix/config.nix
+++ b/.nix/config.nix
@@ -6,7 +6,7 @@
       mathcomp.override.version = "hierarchy-builder";
       mathcomp.job = false;
       mathcomp-single.job = true;
-      coq-elpi.override.version = "master";
+      coq-elpi.override.version = "v1.11.1";
   }; in {
     "coq-8.13".coqPackages = {
       coq.override.version = "8.13";