Use set-default so that we don't override the exisiting

environment variable

pkgs/applications/networking/remote/remmina/default.nix

@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
 
   preFixup = ''
     gappsWrapperArgs+=(
-      --set SSL_CERT_DIR "/etc/ssl/certs/"
+      --set-default SSL_CERT_DIR "/etc/ssl/certs/"
       --prefix LD_LIBRARY_PATH : "${libX11.out}/lib"
     )
   '';