For those wanting to use LMMS 1.3.0 instead of the outdated stable release that’s never updated, 1.2.2, use this overlay that @fps & TehBoss from the IRC put together:
nixpkgs.overlays = [
(self: super: {
lmms = super.lmms.overrideAttrs {
version = "1.3.0-alpha.1";
src = pkgs.fetchFromGitHub {
owner = "LMMS";
repo = "lmms";
rev = "bda042e1eb59e4c7508faa072051c50c2e12894d";
sha256 = "sha256-EGJcTzPUkIqURHKjX6dTRkeRTqwHM8eG74lYVILgSAs";
fetchSubmodules = true;
};
patches = [];
};
})
];