diff --git a/pkgs/applications/science/math/yacas/default.nix b/pkgs/applications/science/math/yacas/default.nix
index 2c9d63be1b4..af284a2f82e 100644
--- a/pkgs/applications/science/math/yacas/default.nix
+++ b/pkgs/applications/science/math/yacas/default.nix
@@ -8,6 +8,8 @@ stdenv.mkDerivation rec {
     sha256 = "1dmafm3w0lm5w211nwkfzaid1rvvmgskz7k4500pjhgdczi5sd78";
   };
 
+  hardening_format = false;
+
   # Perl is only for the documentation
   nativeBuildInputs = [ perl ];
 
@@ -32,7 +34,7 @@ stdenv.mkDerivation rec {
     '';
   };
 
-  meta = { 
+  meta = {
       description = "Easy to use, general purpose Computer Algebra System";
       homepage = http://yacas.sourceforge.net/;
       license = stdenv.lib.licenses.gpl2Plus;