nixd fails despite $PATH presence #347

ekhh commented 2026年06月20日 23:31:55 +02:00

Background

nixd is a Nix language server backed by the Nix Community. It supports some new features and is the de facto successor of nil, which has not been updated for quite a while now.

Problem

nixd is not supported in Gram. I have not learned Rust, but Gram seems to be checking for only the presence of nil. This causes any attempt to use nixd to fail regardless of language_servers and $PATH if and only if nil is unavailable. It also causes nil to appear as nixd if and only if nil is available.

2026年06月20日T14:05:19-07:00 ERROR [project::lsp_store] Failed to start language server "nixd": Download disabled for this language server, check the configuration

Steps to reproduce

1. Make nixd or nil available in $PATH (e.g. by running nix-shell -p nixd and launching gram).
2. Apply the following configurations in settings.jsonc:

{
	"languages" :{
		"Nix" :{
 		// nixd fails if nil is unavailable; nil appears as nixd if nil is available.
			"language_servers": ["nixd"]
		}
	}
}

{
	"languages" :{
		"Nix" :{
 		// If nil is available, editor mistakes nil for nixd and uses it regardless of nixd availability.
 		// Both fails if nil is unavailable. This also results in duplicated tool tips.
			"language_servers": ["nil", "nixd"]
		}
	}
}

{
	"languages" :{
		"Nix" :{
 		// nil used; expected behaviour.
			"language_servers": ["nil"]
		}
	}
}

3. Attempt to edit any Nix file.

System metadata

• system: "x86_64-linux"
• host os: Linux 7.0.12-zen1, NixOS, 26.05 (Yarara), 26.05.20260611.a037402
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.34.7
• channels(root): ""
• nixpkgs: /nix/store/zx3v86x9xyh8jvac5zg6px9gkg9v0igq-source

### Background [`nixd`](https://github.com/nix-community/nixd) is a Nix language server backed by the [Nix Community](https://github.com/nix-community). It supports some new features and is the _de facto_ successor of [`nil`](https://github.com/oxalica/nil), which has not been updated for quite a while now. ### Problem `nixd` is not supported in Gram. I have not learned Rust, but [Gram seems to be checking for only the presence of `nil`](https://codeberg.org/GramEditor/gram/src/commit/648c071514bc5c821b7bf954ba8e7eeb8e1a377d/crates/languages/src/nix.rs). This causes any attempt to use `nixd` to fail regardless of `language_servers` and `$PATH` if and only if `nil` is unavailable. It also causes `nil` to appear as `nixd` if and only if `nil` is available. <pre>2026年06月20日T14:05:19-07:00 <font color="#C01C28"><b>ERROR</b></font> [<b>project::lsp_store</b>] Failed to start language server &quot;nixd&quot;: Download disabled for this language server, check the configuration </pre> ### Steps to reproduce 1. Make `nixd` or `nil` available in `$PATH` (e.g. by running `nix-shell -p nixd` and launching `gram`). 2. Apply the following configurations in `settings.jsonc`: ```jsonc { "languages" :{ "Nix" :{ // nixd fails if nil is unavailable; nil appears as nixd if nil is available. "language_servers": ["nixd"] } } } ``` ```jsonc { "languages" :{ "Nix" :{ // If nil is available, editor mistakes nil for nixd and uses it regardless of nixd availability. // Both fails if nil is unavailable. This also results in duplicated tool tips. "language_servers": ["nil", "nixd"] } } } ``` ```jsonc { "languages" :{ "Nix" :{ // nil used; expected behaviour. "language_servers": ["nil"] } } } ``` 3. Attempt to edit any Nix file. ### System metadata - system: `"x86_64-linux"` - host os: `Linux 7.0.12-zen1, NixOS, 26.05 (Yarara), 26.05.20260611.a037402` - multi-user?: `yes` - sandbox: `yes` - version: `nix-env (Nix) 2.34.7` - channels(root): `""` - nixpkgs: `/nix/store/zx3v86x9xyh8jvac5zg6px9gkg9v0igq-source`

krig commented 2026年06月23日 20:11:42 +02:00

Should be fixed on main now!

Should be fixed on main now!