nix-hs-shells

---

• Introduction
• GHC Support Matrix
• Shells
  • Default
  • LiquidHaskell

Introduction

This packages provides lightweight nix shells for general haskell development with cabal.

GHC Support Matrix

The below matrix shows how well a particular GHC version is supported. Legend:

• 🌕: Support exists with good caching.
• 🌓: Support exists with poor caching.
• 🌑: Support does not exist.

In particular:

• Caching: A 🌕 means that the GHC shell has fast caching for itself. A 🌓 means that the bare GHC shell has poor caching.
• HLS: If the haskell-language-server is supported.
• Other Tools: A 🌕 means that all (non-HLS) tools are supported with good caching. A 🌓 means that at least one tool has poor caching, and 🌑 means that at least one tool is not supported.

GHC versions that support all tools and have fast caching are bolded. Precise information can be found in the source: nix/ghc_map.nix. In the interest of brevity, only the latest 3 major versions are listed. Older versions are listed in the collapsed table below.

GHC	Caching	HLS	Other Tools
9.6.1	🌓	🌕	🌕
9.6.2	🌕	🌕	🌕
9.6.3	🌕	🌕	🌕
9.6.4	🌕	🌕	🌕
9.6.5	🌕	🌕	🌕
9.6.6	🌕	🌕	🌕
9.8.1	🌕	🌓	🌑
9.8.2	🌕	🌕	🌕
9.10.1	🌕	🌕	🌑

Click to expand legacy versions

GHC	Caching	HLS	Other Tools
8.10.7	🌕	🌕	🌕
9.0.2	🌕	🌕	🌕
9.2.5	🌕	🌕	🌕
9.2.7	🌕	🌕	🌕
9.2.8	🌕	🌕	🌕
9.4.4	🌓	🌕	🌕
9.4.5	🌕	🌕	🌕
9.4.6	🌕	🌕	🌕
9.4.7	🌕	🌕	🌕
9.4.8	🌕	🌕	🌕

Shells

This section lists the provided shells. For shells with arguments, the default value (if any) is listed in parentheses.

Common Args

• applyRefact (false)
• fourmolu (false)
• ghcVers
• ormolu (false)
• hlint (false)
• hls (false)

Default

Attr: default

Description: Nix shell for general haskell development. Most packages can use this shell. Includes cabal and ghc. Note that there is no guarantee every dev tool will work with every ghcVers. In particular, there will often be a lag time before the latest GHCs are fully supported.

The default ghc is the latest version that works with every tool and has decent nix caching.

Args:

• applyRefact
• fourmolu
• ghcVers (ghc982)
• hlint
• hls
• ormolu

Usage:

nix-shell http://github.com/tbidne/hs-nix-shells/archive/main.tar.gz -A default

nix-shell http://github.com/tbidne/hs-nix-shells/archive/main.tar.gz -A default \
  --argstr ghcVers ghc925 \
  --arg hls true

LiquidHaskell

Attr: liquidhaskell

Description: Nix shell for LiquidHaskell. Includes cabal, ghc, and the z3 smt solver.

Args:

• ghcVers
• hlint
• hls

Usage:

nix-shell http://github.com/tbidne/hs-nix-shells/archive/main.tar.gz -A liquidhaskell