diff --git a/pkgs/development/compilers/urweb/default.nix b/pkgs/development/compilers/urweb/default.nix
index 90656b564c7..dc862940edf 100644
--- a/pkgs/development/compilers/urweb/default.nix
+++ b/pkgs/development/compilers/urweb/default.nix
@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
     sed -e 's@/usr/bin/file@${file}/bin/file@g' -i configure
   '';
 
+  configureFlags = "--with-openssl=${openssl}";
+
   preConfigure = ''
     export PGHEADER="${postgresql}/include/libpq-fe.h";
     export MSHEADER="${mysql.lib}/include/mysql/mysql.h";