❯ stack build

Error: While constructing the build plan, the following exceptions were encountered:

In the dependencies for mdr3-0.1.0.0:
    sockaddr needed, but the stack configuration has no specified version  (latest matching version is 0.0.0)
needed since mdr3 is a build target.

Some different approaches to resolving this:

  * Recommended action: try adding the following to your extra-deps in /home/louis/dev/mdr3/stack.yaml:

- sockaddr-0.0.0@sha256:abd855de908f0b846409335d60ffc69b279ff869f9575fb85934f4fe0d378867,787

======================================================================

name:                mdr3
version:             0.1.0.0
github:              "githubuser/mdr3"
license:             BSD3
author:              "Author name here"
maintainer:          "example@example.com"
copyright:           "2020 Author name here"

extra-source-files:
- README.md
- ChangeLog.md

# Metadata used when publishing your package
# synopsis:            Short description of your package
# category:            Web

# To avoid duplicated efforts in documentation and dealing with the
# complications of embedding Haddock markup inside cabal files, it is
# common to point users to the README.md file.
description:         Please see the README on GitHub at <https://github.com/githubuser/mdr3#readme>

dependencies:
- base >= 4.7 && < 5
- bytestring
- network
- utf8-string
- hspec
- sockaddr

library:
  source-dirs: src

executables:
  mdr3-exe:
    main:                Main.hs
    source-dirs:         app
    ghc-options:
    - -threaded
    - -rtsopts
    - -with-rtsopts=-N
    dependencies:
    - mdr3

tests:
  mdr3-test:
    main:                Spec.hs
    source-dirs:         test
    ghc-options:
    - -threaded
    - -rtsopts
    - -with-rtsopts=-N
    dependencies:
    - mdr3