gem install pg: fatal error: libpq-fe.h: No such file or directory

[MartinElvar]

What happened?

I'm trying to setup my rails project, it works perfectly fine with a normal nix-shell, but not with dev box

I'm getting, even tho postgresql is installed.

-I/nix/store/vpaj7w9aif0gbfs2bfpvav8a2026wkam-ruby-3.3.5/include/ruby-3.3.0 -I. "-IThe real pg_config can be found in the -dev output." -O3 -fPIC -c conftest.c"
conftest.c:3:10: fatal error: libpq-fe.h: No such file or directory

Steps to reproduce

1. gem install pg

Command

No response

devbox.json

{
  "packages": {
    "ruby":       "3.3",
    "bundler":    "2.5",
    "nodejs":     "21",
    "yarn":       "1.22",
    "curl":       "latest",
    "sqlite":     "latest",
    "postgresql": "latest",
    "nix-ld":     "latest"
  },
  "shell": {
    "init_hook": [
      "gem install rails -v 7.2",
      "./blog/bin/bundle install",
      "./blog/bin/rails -f ./blog/Rakefile db:prepare"
    ],
    "scripts": {
      "run_test":     ["./blog/bin/rails test"],
      "start_server": ["./blog/bin/rails server"]
    }
  }
}

Devbox version

0.13.6

Nix version

unstable nixos

What system does this bug occur on?

Linux (x86-64)

Debug logs

No response

[Lagoja]

I think you need to install the dev output of postgresql in order to add the header files to the project. Can you try removing postgresql and reinstalling it with:

devbox add postgresql@latest --outputs=out,dev

[MartinElvar]

That did the trick, thank you!