installed apps don’t show up in Ubuntu's "Show Applications" #1439
Description
Issue description
Apps installed via home-manager don't show up in the Ubuntu "Show Applications" thingy.
See https://discourse.nixos.org/t/home-manager-installed-apps-dont-show-up-in-applications-launcher/8523 for context. https://github.com/rycee/home-manager/blob/master/modules/misc/xdg-mime.nix suggests that home-manager should be adding these applications to the desktop manager database automatically, but for some reason it's not working. Note that running update-desktop-database manually on a copy of the relevant stuff in the nix store does work, as discussed in the Discourse thread.
I have targets.genericLinux.enable = true and verified that $XDG_DATA_DIRS is being set appropriately:
❯ echo $XDG_DATA_DIRS
/nix/var/nix/profiles/default/share:/home/skainswo/.nix-profile/share:/home/skainswo/deleteme:/home/skainswo/.nix-profile/share/applications:/home/skainswo/.nix-profile/share/applications:/home/skainswo/.nix-profile/share/applications:/usr/share/ubuntu:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
Here's the entirety of my home.nix: https://gist.github.com/samuela/b507cb3a3effde6117b32700add2f448. I'm running Ubuntu 20.04.
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Technical details
❯ nix-shell -p nix-info --run "nix-info -m"
- system: `"x86_64-linux"`
- host os: `Linux 5.4.0-42-generic, Ubuntu, 20.04.1 LTS (Focal Fossa)`
- multi-user?: `no`
- sandbox: `yes`
- version: `nix-env (Nix) 2.3.7`
- channels(skainswo): `"home-manager, nixpkgs-20.09pre237891.f9eba87bf03"`
- nixpkgs: `/home/skainswo/.nix-defexpr/channels/nixpkgs`