diff --git a/nix/frama-ci.nix b/nix/frama-ci.nix
index 58ce20ae843ccc1db1d60dde23a97ced035f2c89..4f3735386260ede9cd06d420ac8865ce3ad82f65 100644
--- a/nix/frama-ci.nix
+++ b/nix/frama-ci.nix
@@ -5,7 +5,7 @@ let
     src = builtins.fetchGit {
             "url" = "https://bobot:${password}@git.frama-c.com/frama-c/Frama-CI.git";
             "name" = "Frama-CI";
-            "rev" = "30cb528aa3dedd1133ef924dbf17b117b3612ea9";
+            "rev" = "c18a78b1b42bccfaad13a190a44f6c80f836f34c";
             "ref" = "fix/interface-files";
     };
     pkgs = import "${src}/pkgs.nix" {};
diff --git a/nix/frama-ci.sh b/nix/frama-ci.sh
index 92e2f9dc3defcf2d7046921fee65718c1f792ebf..e49f84cf454377fcd9c62fd5cff0f98f5f6d39c3 100755
--- a/nix/frama-ci.sh
+++ b/nix/frama-ci.sh
@@ -8,5 +8,5 @@ export FRAMA_CI=$(nix-instantiate --eval -E "((import <nixos-20.03> {}).callPack
 FRAMA_CI=${FRAMA_CI#\"}
 FRAMA_CI=${FRAMA_CI%\"}
 
-export NIXPKGS=$(eval echo $(nix-instantiate --eval -E "with import $FRAMA_CI/pkgs-ref.nix; url))
+export NIXPKGS=$(eval echo $(nix-instantiate --eval -E "with import $FRAMA_CI/pkgs-ref.nix; url"))
 $FRAMA_CI/compile.sh $@