roc-toolkit: fix build for FreeBSD (#387692)

Author: Aleksanaa

pkgs/by-name/ro/roc-toolkit/package.nix

@@ -68,6 +68,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional (!libunwindSupport) "--disable-libunwind"
     ++ lib.optional (!pulseaudioSupport) "--disable-pulseaudio"
     ++ lib.optional (!libsndfileSupport) "--disable-sndfile"
+    ++ lib.optional stdenv.hostPlatform.isFreeBSD "--platform=unix"
     ++ (
       if (!openfecSupport) then
         [ "--disable-openfec" ]
@@ -78,6 +79,11 @@ stdenv.mkDerivation rec {
         ]
     );
 
+  env = lib.optionalAttrs stdenv.hostPlatform.isFreeBSD {
+    NIX_CFLAGS_COMPILE = "-D_XOPEN_SOURCE=700 -D__BSD_VISIBLE";
+    NIX_LDFLAGS = "-lpthread";
+  };
+
   meta = with lib; {
     description = "Roc is a toolkit for real-time audio streaming over the network";
     homepage = "https://github.com/roc-streaming/roc-toolkit";