RC5 Runtime Failure NixOS

[fuguesoft]

Specs

[x] Operating System: NixOS 26.05
[x] Desktop Environment: niriWM
[x] Terminal Emulator: foot
[x] Shell: fish 4.6.0
[x] Software Version: RC5

Description

When attempting to build the rc5 candidate on nixos, the build errors out due to
an non-writeable /tmp directory.

One can work around this by setting $TEMP themselves:

mkdir rc_temp
TEMP=rc_temp nix run github:GraphiteEditor/Graphite

Steps to reproduce

1. Use nix run to build the rc candidate:

nix run github:GraphiteEditor/Graphite

Expected behavior

The project would build and run correctly according to the provided
instructions.

Screenshots

Logs

Available WGPU adapters:
[0] Vulkan IntegratedGpu (Name: AMD Radeon 780M Graphics (RADV PHOENIX), Driver: radv, Device: 5567)
[1] Vulkan Cpu (Name: llvmpipe (LLVM 21.1.8, 256 bits), Driver: llvmpipe, Device: 0)
[2] Gl Other (Name: AMD Radeon 780M Graphics (radeonsi, phoenix, ACO, DRM 3.64, 6.19.11), Driver: , Device: 0)

Using WGPU adapter: AdapterInfo { name: "AMD Radeon 780M Graphics (RADV PHOENIX)", vendor: 4098, device: 5567, device_type: IntegratedGpu, device_pci_bus_id: "0000:c1:00.0", driver: "radv", driver_info: "Mesa 26.0.4", backend: Vulkan, subgroup_min_size: 32, subgroup_max_size: 64, transient_saves_memory: false }

thread 'main' (990551) panicked at desktop/src/cef/context/builder.rs:79:43:
Failed to create temporary directory for CEF instance: Os { code: 13, kind: PermissionDenied, message: "Permission denied" }
stack backtrace:
   0:     0x5646fac222ea - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h530ac34e196461be
   1:     0x5646f92c401a - core::fmt::write::hfebbe83a528033c1
   2:     0x5646fac22d36 - std::io::default_write_fmt::h0ba17d3fe335279a
   3:     0x5646fac1f8a3 - std::panicking::default_hook::{{closure}}::h19be2464c5c0a285
   4:     0x5646fac1f745 - std::panicking::default_hook::h613c80136145dcc7
   5:     0x5646fac1fabb - std::panicking::panic_with_hook::hb09a36a2026ab877
   6:     0x5646fac1f948 - std::panicking::panic_handler::{{closure}}::ha4299fe6dc67fbbc
   7:     0x5646fac1f119 - std::sys::backtrace::__rust_end_short_backtrace::hafec91f98267cfd4
   8:     0x5646fac1b2ed - __rustc[cba8e45071337d10]::rust_begin_unwind
   9:     0x5646f8f877ac - core::panicking::panic_fmt::h41b75fcbafe65d21
  10:     0x5646f8f874e2 - core::result::unwrap_failed::hec126d4a1961cb02
  11:     0x5646f95c97e3 - graphite_desktop::cef::context::builder::CefContextBuilder<H>::create::h6fc30a111a649d11
  12:     0x5646f95db99e - graphite_desktop::start::h0137246f15ca12fc
  13:     0x5646f9575d03 - std::sys::backtrace::__rust_begin_short_backtrace::ha164532b5092f231
  14:     0x5646f9575cf9 - std::rt::lang_start::{{closure}}::hf9faa02f67bbe4c7
  15:     0x5646fac1de27 - std::rt::lang_start_internal::h68c86ce285fb0520
  16:     0x5646f9575d5c - main
  17:     0x7fca1f42b285 - __libc_start_call_main
  18:     0x7fca1f42b338 - __libc_start_main_alias_2
  19:     0x5646f91aa505 - _start
  20:                0x0 - <unknown>

Environment

/etc/nixos/configuration.nix excerpt

  nix.settings = {
    substituters = [ 
      # "https://graphite.cachix.org" 
      "https://nix-community.cachix.org"
    ];
    trusted-public-keys = [ 
      # "graphite.cachix.org-1:B7Il1yMpkquN/dXM+5GRmz+4Xmu2aaCS1GcWNfFhsOo=" 
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
    ];

    experimental-features = [
      "nix-command"
      "flakes"
    ];
    allowed-users = [
      "@wheel"
      "fugue"
    ];
    trusted-users = [
      "root"
      "fugue"
      "@wheel"
    ];
  };