diff --git a/nix/frama-c-checkers-shell.nix b/nix/frama-c-checkers-shell.nix
index 40a0406a77685de48266658d19caeb00488df77f..c552a3c4e64adb91f260ef2b2831a77bbf3a86d6 100644
--- a/nix/frama-c-checkers-shell.nix
+++ b/nix/frama-c-checkers-shell.nix
@@ -1,5 +1,6 @@
 { lib
 , stdenv
+, black
 , clang_10
 , frama-c-hdrck
 , frama-c-lint
@@ -12,6 +13,7 @@
 stdenv.mkDerivation rec {
   name = "frama-c-checkers-shell";
   buildInputs = [
+    black
     clang_10
     frama-c-hdrck
     frama-c-lint