diff --git a/nix/frama-ci.nix b/nix/frama-ci.nix
index 3e9272dcc9279b21650049257d4bef892b616836..58ce20ae843ccc1db1d60dde23a97ced035f2c89 100644
--- a/nix/frama-ci.nix
+++ b/nix/frama-ci.nix
@@ -5,7 +5,7 @@ let
     src = builtins.fetchGit {
             "url" = "https://bobot:${password}@git.frama-c.com/frama-c/Frama-CI.git";
             "name" = "Frama-CI";
-            "rev" = "38ad0883ae35815ec3482bd36c975ce33f9f83f3";
+            "rev" = "30cb528aa3dedd1133ef924dbf17b117b3612ea9";
             "ref" = "fix/interface-files";
     };
     pkgs = import "${src}/pkgs.nix" {};
diff --git a/nix/frama-ci.sh b/nix/frama-ci.sh
index dbbe1bb07e4976298cd85cb0a96675ab78d5ac56..92e2f9dc3defcf2d7046921fee65718c1f792ebf 100755
--- a/nix/frama-ci.sh
+++ b/nix/frama-ci.sh
@@ -3,10 +3,10 @@
 DIR=$(dirname $0)
 
 export FRAMA_CI_NIX=$DIR/frama-ci.nix
-
 export FRAMA_CI=$(nix-instantiate --eval -E "((import <nixos-20.03> {}).callPackage $FRAMA_CI_NIX  { password = \"$TOKEN_FOR_API\";}).src.outPath")
 
 FRAMA_CI=${FRAMA_CI#\"}
 FRAMA_CI=${FRAMA_CI%\"}
 
+export NIXPKGS=$(eval echo $(nix-instantiate --eval -E "with import $FRAMA_CI/pkgs-ref.nix; url))
 $FRAMA_CI/compile.sh $@