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The `.service` file defining the `systemd` unit for `autorandr.service` which is bundled with the package itself uses `--default default` in the `ExecStart` section. This can be an issue when having multiple layouts (e.g. `default` as workstation layout I mostly work on and `mobile` when I go somewhere else). When the service gets restarted and `--default` can't be applied, however the current layout can't be detected (e.g. when working with an unknown beamer) the service silently fails with a message like this: ``` Jun 22 18:44:46 hauptshuhle autorandr[3168]: /nix/store/h83b72ffm68nm8fyjnppljchp456a94r-xrandr-1.5.0/bin/xrandr: ca> Jun 22 18:44:46 hauptshuhle autorandr[3168]: Failed to apply profile 'default' (line 718): Jun 22 18:44:46 hauptshuhle autorandr[3168]: Command failed: /nix/store/h83b72ffm68nm8fyjnppljchp456a94r-xrandr-1.> ``` As discussed in the IRC (see https://botbot.me/freenode/nixos/2018-07-05/?msg=101791455&page=6) it's a bad long-term solution in terms of maintenance to manually patch the service file bundled with the derivation, instead the service shall be configured declaratively. Additionally this makes possible overrides from the user-space way easier. The `udev` rule (in `$out/etc/udev/rules.d`) won't' be affected, it simply runs `systemctl start autorandr.service` when e.g. a new display is added, so now `udev` communicates with the NixOS systemd unit.
Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the Hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:
% git remote add channels git://github.com/NixOS/nixpkgs-channels.git
For stability and maximum binary package support, it is recommended to maintain
custom changes on top of one of the channels, e.g. nixos-18.03 for the latest
release and nixos-unstable for the latest successful build of master:
% git remote update channels
% git rebase channels/nixos-18.03
For pull-requests, please rebase onto nixpkgs master.
NixOS Linux distribution source code is located inside
nixos/ folder.
- NixOS installation instructions
- Documentation (Nix Expression Language chapter)
- Manual (How to write packages for Nix)
- Manual (NixOS)
- Community maintained wiki
- Continuous package builds for unstable/master
- Continuous package builds for 18.03 release
- Tests for unstable/master
- Tests for 18.03 release
Communication: