mirakurun: use node 18

[midchildan]

Description of changes

Relates to #229910.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[SuperSandro2000]

Suggested change

	mkdir -p $out/share/man/man1
	sed 's/@DESCRIPTION@/${meta.description}/g' ${./mirakurun.1} \
	| ${gzip}/bin/gzip > $out/share/man/man1/mirakurun.1.gz
	sed 's/@DESCRIPTION@/${meta.description}/g' ${./mirakurun.1} > mirakurun.1
	installManPage mirakurun.1

[midchildan]

Thanks, I pushed a fix.

[SuperSandro2000]

We normally don't write man pages but use the nixos manual instead

[midchildan]

As noted in this document, the primary way of using Mirakurun is through the NixOS module. So the main document is in the options section of the NixOS manual, and this man page isn't something that I meant to prominently feature in the manual.

Additionally, this is mainly written for people who try to run the command directly and get confused. For that audience, it's not very clear at first that this is an Nix-provided command instead of something provided by upstream and I think it's natural to look in the man pages.

[github-actions]

Successfully created backport PR for release-23.05:

• [Backport release-23.05] mirakurun: use node 18 #233988