mautrix-facebook: Add version test.

pkgs/servers/mautrix-facebook/default.nix

@@ -38,8 +38,6 @@ python3.pkgs.buildPythonPackage rec {
     sed -i -e 's/,<.*//' requirements.txt
   '';
 
-  doCheck = false;
-
   postInstall = ''
     mkdir -p $out/bin
 
@@ -50,6 +48,10 @@ python3.pkgs.buildPythonPackage rec {
     chmod +x $out/bin/mautrix-facebook
   '';
 
+  checkPhase = ''
+    $out/bin/mautrix-facebook --help
+  '';
+
   meta = with lib; {
     homepage = "https://github.com/mautrix/facebook";
     description = "A Matrix-Facebook Messenger puppeting bridge";