self: super: let srcpkg = super.iosevka-tv-2; binpkg = self.fetchzip { inherit (srcpkg) pname version; stripRoot = false; hash = "sha256-PuIrW1ftYD5PW4du6gq1XpUM3v0potwmj+vAxJImF/A="; urls = [ "https://c.krebsco.de/${srcpkg.name}.tar.gz" "https://ni.krebsco.de/~tv/mirrors/iosevka/${srcpkg.name}.tar.gz" ]; }; in if srcpkg.version == binpkg.version then binpkg else srcpkg