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Nix: FIleNotFound error when compiling ZLS with Zig patched with BSP patches #3271
Closed as not planned
Description
Zig Version
0.18.0-dev.1+a6c6412a8
ZLS Version
0.17.0-dev+c248ca1
Client / Code Editor / Extensions
No response
Steps to Reproduce and Observed Behavior
- Use a
flake.nixthat creates a development shell environment which installs ZLS (build-runner-processbranch) and the latest revision of Zig (patched with BSP patches):
{
description = "Zig development environment";
inputs = {
nixpkgs.url = "nixpkgs/nixos-unstable-small";
zig-flake = {
url = "github:silversquirl/zig-flake";
inputs = {
nixpkgs.follows = "nixpkgs";
};
};
zig2nix = {
url = "github:Cloudef/zig2nix";
inputs = {
nixpkgs.follows = "nixpkgs";
};
};
zls = {
url = "github:zigtools/zls/techatrix/build-runner-process";
inputs = {
nixpkgs.follows = "nixpkgs";
zig-flake.follows = "zig-flake";
};
};
};
outputs =
{
self,
nixpkgs,
zig-flake,
zig2nix,
zls-flake,
}:
let
forAllSystems =
f:
nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (system: f nixpkgs.legacyPackages.${system});
in
{
devShell = forAllSystems (
{ pkgs, ... }:
let
zig =
(zig2nix.outputs.packages.${pkgs.stdenv.hostPlatform.system}.zig-src-master).overrideAttrs
(oldAttrs: {
patches = oldAttrs.patches or [ ] ++ [
./patches/bsp.patch
];
});
zls = (
zls-flake.packages.${pkgs.stdenv.hostPlatform.system}.zls.overrideAttrs (oldAttrs: {
nativeBuildInputs = [ zig ];
doCheck = false;
})
);
in
pkgs.mkShell {
packages = [
zig
zls
pkgs.lldb_22 # NOTE: Always match lldb with LLVM version of Zig.
];
}
);
};
}
- Observe that the following error occurs during the
buildPhaseof ZLS:
zls> error: failed to open "/build/source/nix/store/ak8nghi0r2ai7dkqsz79bh763bmnm11b-zig-packages/diffz-0.0.1-G2tlISvOAQDORzPTSxDgiKwlHuADKeJMdJrw4kRfLufj": FileNotFound
zls> error: configure command exited with code 1: .zig-cache/o/68eb8637f161993d966e6fc90ee2176b/configurer --zig /nix/store/lh9qi18mxdq4pgbj53dyvipcghw0ma0h-zig-0.18.0-dev.1+a6c6412a8/bin/zig --build-root /build/source --system -Dtarget=x86_64-linux -Doptimize=ReleaseSafe -Dversion-string=0.17.0-dev+c248ca1 --color=off
Expected Behavior
ZLS compiles successfully with Nix and correctly sets the build root to the Nix store path.
Attach ZLS log output
zls.log
info ( main ): Starting ZLS VERSION @ '/path/to/zls'
...
Activity
techatrix commentedon Oct 13, 2026
The
build-runner-processbranch in ZLS is no longer meant to be used with the forkedbspbranch for Zig. It is currently targeting stock Zig 0.17.0. The used patches are still experimental so it's also too early for bug reports. Once #3270 is merged, you and others are welcome to test and report back any issues.