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-rw-r--r--pkgs/games/gtypist/default.nix2
1 files changed, 2 insertions, 0 deletions
diff --git a/pkgs/games/gtypist/default.nix b/pkgs/games/gtypist/default.nix
index 43b95bacefc8d..169b0fa77db08 100644
--- a/pkgs/games/gtypist/default.nix
+++ b/pkgs/games/gtypist/default.nix
@@ -9,6 +9,8 @@ stdenv.mkDerivation rec {
     sha256 = "0xzrkkmj0b1dw3yr0m9hml2y634cc4h61im6zwcq57s7285z8fn1";
   };
 
+  CFLAGS = "-std=gnu89";
+
   nativeBuildInputs = [ makeWrapper ];
   buildInputs = [ ncurses perl fortune ]
    ++ lib.optional stdenv.isDarwin libiconv;