self: super: { prosody = super.prosody.overrideAttrs (oldAttrs: { communityModules = super.fetchhg { url = "https://hg.prosody.im/prosody-modules"; rev = "268fa9d45840"; sha256 = "1a5ihbg5b0bsw224hdj4fxwy0j98yjzbijz85gd34x923dh3vvkl"; }; }); }