Cowork not being installed on NixOS

[filiptrplan]

When I open Cowork, it gives me the following error:

Doctor output:

Claude Desktop Diagnostics
================================

[PASS] Display server: Wayland (WAYLAND_DISPLAY=wayland-1)
       Desktop: niri
       Mode: X11 via XWayland (default, for global hotkey support)
       Tip: Set CLAUDE_USE_WAYLAND=1 for native Wayland
            (disables global hotkeys)
       Menu bar mode: auto (default, Alt toggles visibility)
[PASS] Electron: v41.0.2 (/nix/store/j29k8klvkiqy8bi262cw30j2dwyq5vkk-claude-desktop-1.1062.0/lib/claude-desktop/electron/electron-wrapper)
[FAIL] Chrome sandbox: perms=777, owner=nobody
       Fix: sudo chown root:root /nix/store/j29k8klvkiqy8bi262cw30j2dwyq5vkk-claude-desktop-1.1062.0/lib/claude-desktop/electron/chrome-sandbox
            sudo chmod 4755 /nix/store/j29k8klvkiqy8bi262cw30j2dwyq5vkk-claude-desktop-1.1062.0/lib/claude-desktop/electron/chrome-sandbox
[PASS] SingletonLock: held by running process (PID 1122755)
[PASS] MCP config: valid JSON (/home/filip/.config/Claude/claude_desktop_config.json)
       MCP servers configured: 0
[PASS] Node.js: v22.22.2
       Path: /usr/bin/node
[PASS] Desktop entry: /usr/share/applications/claude-desktop.desktop
[PASS] Disk space: 431483MB free

Cowork Mode
----------------
[PASS] bubblewrap: found
[PASS] KVM: accessible
[PASS] vsock: module loaded
[PASS] QEMU: found
       socat: not found
       virtiofsd: not found
       VM image: not downloaded yet
       Cowork isolation: bubblewrap (namespace sandbox)
[PASS] Cowork daemon: running (parent alive)
[PASS] Log file: 12KB (/home/filip/.cache/claude-desktop-debian/launcher.log)

1 check(s) failed.
See above for fixes.

Log file:

--- Claude Desktop Launcher Start (NixOS) ---
Timestamp: Wed 08 Apr 2026 08:59:11 CEST
Arguments:
Niri detected - forcing native Wayland
Using native Wayland backend (global hotkeys may not work)
Executing: /nix/store/j29k8klvkiqy8bi262cw30j2dwyq5vkk-claude-desktop-1.1062.0/lib/claude-desktop/electron/electron-wrapper --disable-features=CustomTitlebar --no-sandbox --enable-features=UseOzonePlatform,WaylandWindowDecorations --ozone-platform=wayland --enable-wayland-ime --wayland-text-input-version=3 /nix/store/j29k8klvkiqy8bi262cw30j2dwyq5vkk-claude-desktop-1.1062.0/lib/claude-desktop/electron/resources/app.asar
[Frame Fix] Wrapper loaded
[Frame Fix] Menu bar mode: auto
[Frame Fix] Patches built successfully
(node:1122755) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `electron --trace-deprecation ...` to show where the warning was created)
[Frame Fix] Ctrl+Q quit shortcut registered
[Frame Fix] BrowserWindow constructor called
[Frame Fix] Modified frame from undefined to true
[Frame Fix] Linux patches applied
[Frame Fix] Intercepting setApplicationMenu
libEGL warning: pci id for fd 16: 10de:1e84, driver (null)

pci id for fd 17: 10de:1e84, driver (null)
pci id for fd 18: 10de:1e84, driver (null)
libEGL warning: egl: failed to create dri2 screen
libEGL warning: pci id for fd 16: 10de:1e84, driver (null)

pci id for fd 17: 10de:1e84, driver (null)
pci id for fd 18: 10de:1e84, driver (null)
libEGL warning: egl: failed to create dri2 screen
libEGL warning: pci id for fd 16: 10de:1e84, driver (null)

[1122755:0408/085912.550530:ERROR:components/dbus/xdg/request.cc:169] Request ended (non-user cancelled).
[1122755:0408/085912.550558:ERROR:ui/base/accelerators/global_accelerator_listener/global_accelerator_listener_linux.cc:389] Failed to call BindShortcuts (error code 5).
/nix/store/j29k8klvkiqy8bi262cw30j2dwyq5vkk-claude-desktop-1.1062.0/lib/claude-desktop/electron/resources/app.asar/.vite/build/shell-path-worker/shellPathWorker.js:13055
if (!electron.app.isPackaged && false) ;
                  ^

TypeError: Cannot read properties of undefined (reading 'isPackaged')
    at Object.<anonymous> (/nix/store/j29k8klvkiqy8bi262cw30j2dwyq5vkk-claude-desktop-1.1062.0/lib/claude-desktop/electron/resources/app.asar/.vite/build/shell-path-worker/shellPathWorker.js:13055:19)
    at Module._compile (node:internal/modules/cjs/loader:1820:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1953:10)
    at Module.load (node:internal/modules/cjs/loader:1540:32)
    at Module._load (node:internal/modules/cjs/loader:1342:12)
    at c._load (node:electron/js2c/node_init:2:17999)
    at wrapModuleLoad (node:internal/modules/cjs/loader:262:19)
    at loadCJSModuleWithModuleLoad (node:internal/modules/esm/translators:334:3)
    at ModuleWrap.<anonymous> (node:internal/modules/esm/translators:235:7)
    at ModuleJob.run (node:internal/modules/esm/module_job:430:25)

Node.js v24.14.0
[Frame Fix] Intercepting setApplicationMenu
[Frame Fix] Intercepting setApplicationMenu
[Frame Fix] Intercepting setApplicationMenu
[1122807:0408/085914.909085:ERROR:gpu/command_buffer/service/context_group.cc:138] ContextResult::kFatalFailure: WebGL1 blocklisted
[1122807:0408/085914.909874:ERROR:gpu/command_buffer/service/context_group.cc:138] ContextResult::kFatalFailure: WebGL1 blocklisted
[1122807:0408/085914.914770:ERROR:gpu/command_buffer/service/context_group.cc:138] ContextResult::kFatalFailure: WebGL1 blocklisted
[1122807:0408/085914.915313:ERROR:gpu/command_buffer/service/context_group.cc:138] ContextResult::kFatalFailure: WebGL1 blocklisted
[1122807:0408/085915.891949:ERROR:gpu/command_buffer/service/context_group.cc:138] ContextResult::kFatalFailure: WebGL1 blocklisted
[1122807:0408/085915.892603:ERROR:gpu/command_buffer/service/context_group.cc:138] ContextResult::kFatalFailure: WebGL1 blocklisted

I also installed it using the Nix flake and the package claude-desktop-fhs.

[RayCharlizard]

Hey @filiptrplan — apologies, this one slipped through triage when it was filed. Coming back to it now.

Per aaddrick's note on #409, this should be fixed by #421, released as v1.3.32+claude1.3109.0. Short version: the cowork patch in build.sh had a regex that missed $-prefixed minified identifiers, which made the injected Linux block call into the wrong variable and cascade into crashes during cowork startup (the shellPathWorker error you hit is a downstream symptom of the same broken injection). #421 widens the extraction regex from (\w+) to ([$\w]+) and fixes the node-pty asar packaging alongside it.

The nix flake is already bumped to Claude Desktop 1.3109.0 with the fix, so on NixOS:

nix flake update claude-desktop-debian   # or whatever you've called the input
nix build .#claude-desktop-fhs

should pick up the fixed build.

Could you update and give it another try? If cowork still crashes after the update, drop a fresh log here and I'll reopen and dig in — the crash signature would likely be something different at that point.

(Unrelated to the crash, your doctor output shows socat and virtiofsd missing — those are optional deps for KVM-backed cowork; bubblewrap isolation works without them. If you want the full KVM path later, those go in your NixOS config.)

Closing pending your confirmation. Thanks for the detailed report and the full log — made this easy to match up to the broader thread.

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