How to include packages from pkgs?

[miuirussia]

I have project with stack.yaml:

resolver: lts-14.7
packages:
  - '.'
nix:
  packages: [
    bzip2
    icu
    libcxx
    lzma
    mysql80
    pcre
    pkg-config
    postgresql
    zlib
  ]

When I use stack-to-nix, it does not consider for the nix section of stack.yaml, so the build fails with mysql_config not found error. How I can add this packages to default.nix?

[angerman]

@miuirussia I assume you figure out how to fix this? It is true that stack-to-nix ignores the nix section. stack-to-nix just translates the lts + packages into a build plan. Haskell.nix pulls system packages from nixpkgs by default.

Anyway if you figured out how to fix this in a way that works for you, and could let us know that would be great!

[miuirussia]

I added packages manually with modules section in default.nix, maybe it would be great if stack-to-nix do it automatically.

[angerman]

@miuirussia patches welcome! stack-to-nix lives in github.com/input-output-hk/nix-tools, the binaries are all pretty simple haskell programs.

[JorisM]

I added packages manually with modules section in default.nix, maybe it would be great if stack-to-nix do it automatically.

@miuirussia can you tell me how exactly you added it to modules? I'm running into the same issue and cannot figure out how to add it properly. thanks

[thomasjm]

I have the same problem with mysql_config, did you ever figure it out @JorisM ? I tried all of the below options I could find in the documentation but no luck:

packages.mysql.components.library.libs = [pkgs.mysql];
packages.mysql.components.setup.libs = [pkgs.mysql];
packages.mysql.components.library.build-tools = [pkgs.mysql];
packages.mysql.components.setup.build-tools = [pkgs.mysql];
packages.mysql.components.foreignlibs.build-tools = [pkgs.mysql];
packages.mysql.components.sublibs.build-tools = [pkgs.mysql];

[thomasjm]

Never mind, I was just having confusion from using a nixpkgs version where mysql didn't provide the mysql_config binary. The modules command that worked was

packages.mysql.components.library.build-tools = [pkgs.mysql];

[angerman]

@thomasjm awesome!

[thomasjm]

(Also, if you are on newer nixpkgs, you might need pkgs.libmysqlclient instead.)

IMO this issue can be closed, but it would be great if there were a page in the documentation about this. There are a bewildering number of options in the "Module options" section of the docs, and it's not always obvious how they map to the final Nix expressions. I had to go digging into the haskell.nix code to confirm my understanding that build-tools options end up turning into nativeBuildInputs.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[hamishmack]

So we need to add docs that indicate that if you need to add to a components buildInputs use .libs and if you need to add to nativeBuildInputs use .build-tools.