diff --git a/nix/frama-ci.nix b/nix/frama-ci.nix
index c26b5fa8d42ac00667c4f2e36e2c909b15b077dd..e4b4a5c77a4b43e1dd1e0e628c9e5e89069ba42e 100644
--- a/nix/frama-ci.nix
+++ b/nix/frama-ci.nix
@@ -5,7 +5,7 @@ let
     src = builtins.fetchGit {
             "url" = "https://bobot:${password}@git.frama-c.com/frama-c/Frama-CI.git";
             "name" = "Frama-CI";
-            "rev" = "28e429a18df17f911cdbc2ad757e2b549e629d0d";
+            "rev" = "c6a3dc6e81c83d539ec7b0a54cde24be30bea1e8";
             "ref" = "feature/upgrade-opam2nix";
     };
  in
diff --git a/nix/frama-ci.sh b/nix/frama-ci.sh
index d3a76ed345d21339c2bdb9a37abca956c22cab51..dbbe1bb07e4976298cd85cb0a96675ab78d5ac56 100755
--- a/nix/frama-ci.sh
+++ b/nix/frama-ci.sh
@@ -9,11 +9,4 @@ export FRAMA_CI=$(nix-instantiate --eval -E "((import <nixos-20.03> {}).callPack
 FRAMA_CI=${FRAMA_CI#\"}
 FRAMA_CI=${FRAMA_CI%\"}
 
-PIPE=$(mktemp)
-rm $PIPE
-mkfifo $PIPE
-tee results.log < $PIPE &
-$FRAMA_CI/compile.sh $@ > $PIPE 2>&1
-STATUS=$?
-rm $PIPE
-exit $STATUS
+$FRAMA_CI/compile.sh $@