Cannot build with nix

[yaitskov]

Hi.

I modified library and wanted build with nix just from git, nix fails.
It looks like it cannot handle inclusion of package.common.yaml with macros. I face such trick first time. What is the technology used?

*** hpack error: "/nix/store/pa122xh2pjk86w228ld7v7cbcl9k3s5v-source
/package.yaml: 
Yaml file not found: /home/dan/demo/haskell/conferer/conferer/utils/package.common.yaml". 
Exiting.

  myhaskellPackages = haskell.packages.ghc8104.extend (self: super: {

    conferer = self.callCabal2nix "conferer" ../../haskell/conferer/conferer
/packages/conferer {};

[ludat]

Hmm, I don't use nix but I think you could simply ignore the package.yml (so avoid using hpack at all) since the conferer.cabal is commited and we always keep up to date.

[yaitskov]

I am working with nix for a few weeks.
I use callCabal2nix command it looks into package.yaml (hpack) :)

[ludat]

So this is something that's part of the yaml spec, it's called anchors, I think the problem probably is that when you build the package you are only providing nix with the packages/conferer directory and that's not enough. But you can try avoiding hpack completely, maybe there is a flag you can pass to callCabal2nix or maybe you could delete the package.yaml before calling it.

[yaitskov]

Thanks for explanations. I forwarded issue to hpack tracker.