devcontainer.json

{
  "name": "Haskell Dev Container",
  "image": "ghcr.io/lcamel/haskell-devcontainer:latest",
  "customizations": {
    "vscode": {
      "extensions": [
        "haskell.haskell"
      ],
      "settings": {
        // "haskell.manageHLS" should be set to "PATH".
        // The following configuration is a workaround for the issue:
        // https://github.com/haskell/vscode-haskell/issues/1332
        "haskell.manageHLS": "GHCup",
        "haskell.toolchain": {
          "ghc": null,
          "hls": null,
          "stack": null,
          "cabal": null
        },
        // Disable automatic GHCup upgrade.
        "haskell.upgradeGHCup": false,

        // Disable minimap to save screen space.
        "editor.minimap.enabled": false
      }
    }
  },
  // Some Haskell code requires locale settings to process non-ASCII characters.
  "containerEnv": {
    "LC_ALL": "en_US.UTF-8"
  }
}