{ config, ... }: with import ; let nixos-version-id = if (hasAttr "nixos" config.system) then "${config.system.nixos.version}" else "${config.system.nixosVersion}"; nixos-codeName = if (hasAttr "nixos" config.system) then "${config.system.nixos.codeName}" else "${config.system.nixosCodeName}"; nixos-version = "${nixos-version-id} (${nixos-codeName})"; nixos-pretty-name = "NixOS ${nixos-version}"; stockholm-version-id = let eval = tryEval (removeSuffix "\n" (readFile )); in if eval.success then eval.value else "unknown"; stockholm-version = "${stockholm-version-id}"; stockholm-pretty-name = "stockholm ${stockholm-version}"; version = "${stockholm-version}/${nixos-version}"; version-id = "${stockholm-version-id}/${nixos-version-id}"; pretty-name = "${stockholm-pretty-name} / ${nixos-pretty-name}"; home-url = http://cgit.ni.krebsco.de/stockholm; in { # http://0pointer.de/public/systemd-man/os-release.html environment.etc."os-release".text = mkForce '' NAME="stockholm/NixOS" ID=stockholm VERSION="${version}" VERSION_ID="${version-id}" PRETTY_NAME="${pretty-name}" HOME_URL="${home-url}" ''; }