Can't get ruby-vips to work in nix-shell on macOs

Help
1

Hi there :wave:

I’m slowly switching to nix to handle the setup of my dev environment on my M1 MBP.
I’ve been using a nix-shell for most of the projects I’m working on and this has been working fine.

However, I can’t get ruby-vips to work in one of my rails projects: it keep looking for some libraries, even though I’ve tried to include them.

The shell looks like this:

let
  pkgs = import <nixpkgs> { };
in
pkgs.mkShell {
  buildInputs = with pkgs; [
    nodejs-16_x
    postgresql_14
    ruby_3_0
    # We need to exclude the optional dependency libjxl, since it is broken
    # see issue https://github.com/libjxl/libjxl/issues/213
    (vips.override { libjxl = null; })
    yarn
  ];
  shellHook = ''
    export GEM_HOME="$PWD/vendor/bundle/$(ruby -e 'puts RUBY_VERSION')"
    export PATH="$GEM_HOME/bin:$PATH"
  '';
}

Every time vips gets used, I get the following error:

LoadError (Could not open library 'glib-2.0.0': dlopen(glib-2.0.0, 0x0005): tried: '/nix/store/l0rp423b2w8b065w5cdx4s3hanjx464x-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/glib-2.0.0' (no such file), '/nix/store/l0rp423b2w8b065w5cdx4s3hanjx464x-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/glib-2.0.0' (no such file), 'glib-2.0.0' (no such file), '/usr/local/lib/glib-2.0.0' (no such file), '/usr/lib/glib-2.0.0' (no such file), '/Users/robbevp/Documents/code/...project_name.../glib-2.0.0' (no such file), '/usr/local/lib/glib-2.0.0' (no such file), '/usr/lib/glib-2.0.0' (no such file).
Could not open library 'libglib-2.0.0.dylib': dlopen(libglib-2.0.0.dylib, 0x0005): tried: '/nix/store/l0rp423b2w8b065w5cdx4s3hanjx464x-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/libglib-2.0.0.dylib' (no such file), '/nix/store/l0rp423b2w8b065w5cdx4s3hanjx464x-apple-framework-CoreFoundation-11.0.0/Library/Frameworks/libglib-2.0.0.dylib' (no such file), 'libglib-2.0.0.dylib' (no such file), '/usr/local/lib/libglib-2.0.0.dylib' (no such file), '/usr/lib/libglib-2.0.0.dylib' (no such file), '/Users/robbevp/Documents/code/...project_name.../libglib-2.0.0.dylib' (no such file), '/usr/local/lib/libglib-2.0.0.dylib' (no such file), '/usr/lib/libglib-2.0.0.dylib' (no such file)):
  
ffi (1.15.3) lib/ffi/library.rb:145:in `block in ffi_lib'
ffi (1.15.3) lib/ffi/library.rb:99:in `map'
ffi (1.15.3) lib/ffi/library.rb:99:in `ffi_lib'
ruby-vips (2.1.2) lib/vips.rb:45:in `<module:GLib>'
ruby-vips (2.1.2) lib/vips.rb:36:in `<main>'

glib should be included by vips, so I’m unsure what I’m doing wrong. In my old setup, I had vips installed via homebrew and that worked without issues.

I currently can get by with this error showing up every now and then (since image processing is not that important functionality to this project) - but it would be nice to complete this set up.
Any help is very much appreciated!

2

I had the same problem. Adding rubyPackages_3_0.ruby-vips to buildInputs fixed it for me. vips itself is not needed anymore as buildInput.

3

I ended up doing a similar thing.

I now include the whole gemset in my shell:

gems = pkgs.bundlerEnv rec {
          name = "PROJECTNAME-env";
          ruby = pkgs.ruby_3_1;
          gemfile = ./Gemfile;
          lockfile = ./Gemfile.lock;
          gemset = ./gemset.nix;
          groups = [ "default" "development" "test" "production" ];
        };

Both work because the ruby-vips package included in nixpkgs will substitute the calls made to the vips library (and include vips that way):