diff --git a/pkgs/servers/sql/mysql55/default.nix b/pkgs/servers/sql/mysql55/default.nix
index 5025720d62bb..a5f588f747da 100644
--- a/pkgs/servers/sql/mysql55/default.nix
+++ b/pkgs/servers/sql/mysql55/default.nix
@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ cmake bison ncurses openssl readline zlib ];
 
+  enableParallelBuilding = true;
+
   cmakeFlags = "-DWITH_SSL=yes -DWITH_READLINE=yes -DWITH_EMBEDDED_SERVER=yes -DWITH_ZLIB=yes -DINSTALL_SCRIPTDIR=bin -DHAVE_IPV6=yes";
   
   NIX_LDFLAGS = stdenv.lib.optionalString stdenv.isLinux "-lgcc_s";