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-rw-r--r--pkgs/development/libraries/libantlr3c/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/libantlr3c/default.nix b/pkgs/development/libraries/libantlr3c/default.nix
index ef5838188593..6f12bf891b01 100644
--- a/pkgs/development/libraries/libantlr3c/default.nix
+++ b/pkgs/development/libraries/libantlr3c/default.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation {
     sha256 ="0lpbnb4dq4azmsvlhp6khq1gy42kyqyjv8gww74g5lm2y6blm4fa";
   };
 
-  configureFlags = if stdenv.is64bit then "--enable-64bit" else "";
+  configureFlags = stdenv.lib.optional stdenv.is64bit "--enable-64bit";
 
   meta = with stdenv.lib; {
     description = "C runtime libraries of ANTLR v3";