diff --git a/pkgs/tools/security/pcsc-cyberjack/default.nix b/pkgs/tools/security/pcsc-cyberjack/default.nix
index 7ae062547aa2..015e3938c3ef 100644
--- a/pkgs/tools/security/pcsc-cyberjack/default.nix
+++ b/pkgs/tools/security/pcsc-cyberjack/default.nix
@@ -23,6 +23,8 @@ in stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=narrowing";
+
   configureFlags = [
     "--with-usbdropdir=${placeholder "out"}/pcsc/drivers"
     "--bindir=${placeholder "tools"}/bin"