diff --git a/pkgs/development/compilers/chez/default.nix b/pkgs/development/compilers/chez/default.nix
index 9216c7791433..9321c8b2de41 100644
--- a/pkgs/development/compilers/chez/default.nix
+++ b/pkgs/development/compilers/chez/default.nix
@@ -20,6 +20,8 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=format-truncation";
+
   /*
   ** We patch out a very annoying 'feature' in ./configure, which
   ** tries to use 'git' to update submodules.