ats2: fix darwin build

+2
+2
pkgs/development/compilers/ats2/default.nix
··· 52 52 "CCOMP=${stdenv.cc.targetPrefix}cc" 53 53 ]; 54 54 55 + env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-error=implicit-function-declaration"; 56 + 55 57 setupHook = 56 58 let 57 59 hookFiles = [ ./setup-hook.sh ] ++ lib.optional withContrib ./setup-contrib-hook.sh;