diff --git a/pkgs/development/libraries/oniguruma/default.nix b/pkgs/development/libraries/oniguruma/default.nix
index 016207c13060..ea87000f5aa8 100644
--- a/pkgs/development/libraries/oniguruma/default.nix
+++ b/pkgs/development/libraries/oniguruma/default.nix
@@ -12,6 +12,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ autoreconfHook ];
+  configureFlags = [ "--enable-posix-api=yes" ];
 
   meta = with lib; {
     homepage = "https://github.com/kkos/oniguruma";