let pkgs = import <nixpkgs> {}; in pkgs.fetchFromGitHub { owner = "tahoe-lafs"; repo = "tahoe-lafs"; rev = "34aeefd3ddbf28dafbc3477e52461eafa53b545d"; sha256 = "0l8n4njbzgiwmn3qsmvzyzqlb0y9bj9g2jvpdynvsn1ggxrqmvsq"; }