Hyprland fails to build with unstable nixpkgs override

[ShyAssassin]

Hyprland version

v0.56.2

Is this a regression?

Uhhhh, not really

What's the bug?

Hyprland fails to build if you override the nixpkgs input in the flake to be the latest nixpkgs unstable
The build fails with multiple undefined reference to std::.... errors, logs are below

Reproduction steps

1. Add hyprland as a flake input
2. Override nixpkgs the input uses to be the latest unstable nixpkgs
3. Enable hyprland
4. Attempt to build

Attachments

hyprland-guiutils> Running phase: buildPhase
hyprland-guiutils> build flags: -j32 SHELL=/nix/store/byi2zpy2bgcf3dr6y0l8m50rmjj8z7q1-bash-5.3p15/bin/bash
hyprland-guiutils> [ 10%] Building CXX object utils/update-screen/CMakeFiles/hyprland-update-screen.dir/src/main.cpp.o
hyprland-guiutils> [ 20%] Building CXX object utils/donate-screen/CMakeFiles/hyprland-donate-screen.dir/src/main.cpp.o
hyprland-guiutils> [ 30%] Building CXX object utils/run/CMakeFiles/hyprland-run.dir/src/main.cpp.o
hyprland-guiutils> [ 40%] Building CXX object utils/dialog/CMakeFiles/hyprland-dialog.dir/src/main.cpp.o
hyprland-guiutils> [ 50%] Building CXX object utils/welcome/CMakeFiles/hyprland-welcome.dir/src/main.cpp.o
hyprland-guiutils> [ 60%] Linking CXX executable hyprland-donate-screen
hyprland-guiutils> /nix/store/8lkj89binl0xhraqxb8bwmv0q4p3pnlr-binutils-2.46/bin/ld.bfd: /nix/store/a7rhw8mw37my5c3dl0d7k06dqcpmlp1i-hyprtoolkit-0.5.4/lib/libhyprtoolkit.so: undefined reference to `std::basic_format_arg<std::basic_format_context<std::__format::_Sink_iter<char>, char> >::_M_handle_unrecognized() const@GLIBCXX_3.4.36'
hyprland-guiutils> collect2: error: ld returned 1 exit status
hyprland-guiutils> make[2]: *** [utils/donate-screen/CMakeFiles/hyprland-donate-screen.dir/build.make:107: utils/donate-screen/hyprland-donate-screen] Error 1
hyprland-guiutils> make[1]: *** [CMakeFiles/Makefile2:230: utils/donate-screen/CMakeFiles/hyprland-donate-screen.dir/all] Error 2
hyprland-guiutils> make[1]: *** Waiting for unfinished jobs....
hyprland-guiutils> [ 70%] Linking CXX executable hyprland-update-screen
hyprland-guiutils> [ 80%] Linking CXX executable hyprland-dialog
hyprland-guiutils> /nix/store/8lkj89binl0xhraqxb8bwmv0q4p3pnlr-binutils-2.46/bin/ld.bfd: /nix/store/a7rhw8mw37my5c3dl0d7k06dqcpmlp1i-hyprtoolkit-0.5.4/lib/libhyprtoolkit.so: undefined reference to `std::basic_format_arg<std::basic_format_context<std::__format::_Sink_iter<char>, char> >::_M_handle_unrecognized() const@GLIBCXX_3.4.36'
hyprland-guiutils> collect2: error: ld returned 1 exit status
hyprland-guiutils> make[2]: *** [utils/update-screen/CMakeFiles/hyprland-update-screen.dir/build.make:107: utils/update-screen/hyprland-update-screen] Error 1
hyprland-guiutils> make[1]: *** [CMakeFiles/Makefile2:262: utils/update-screen/CMakeFiles/hyprland-update-screen.dir/all] Error 2
hyprland-guiutils> [ 90%] Linking CXX executable hyprland-run
hyprland-guiutils> /nix/store/8lkj89binl0xhraqxb8bwmv0q4p3pnlr-binutils-2.46/bin/ld.bfd: /nix/store/a7rhw8mw37my5c3dl0d7k06dqcpmlp1i-hyprtoolkit-0.5.4/lib/libhyprtoolkit.so: undefined reference to `std::basic_format_arg<std::basic_format_context<std::__format::_Sink_iter<char>, char> >::_M_handle_unrecognized() const@GLIBCXX_3.4.36'
hyprland-guiutils> collect2: error: ld returned 1 exit status
hyprland-guiutils> make[2]: *** [utils/dialog/CMakeFiles/hyprland-dialog.dir/build.make:107: utils/dialog/hyprland-dialog] Error 1
hyprland-guiutils> make[1]: *** [CMakeFiles/Makefile2:198: utils/dialog/CMakeFiles/hyprland-dialog.dir/all] Error 2
hyprland-guiutils> /nix/store/8lkj89binl0xhraqxb8bwmv0q4p3pnlr-binutils-2.46/bin/ld.bfd: /nix/store/a7rhw8mw37my5c3dl0d7k06dqcpmlp1i-hyprtoolkit-0.5.4/lib/libhyprtoolkit.so: undefined reference to `std::basic_format_arg<std::basic_format_context<std::__format::_Sink_iter<char>, char> >::_M_handle_unrecognized() const@GLIBCXX_3.4.36'
hyprland-guiutils> collect2: error: ld returned 1 exit status
hyprland-guiutils> make[2]: *** [utils/run/CMakeFiles/hyprland-run.dir/build.make:107: utils/run/hyprland-run] Error 1
hyprland-guiutils> make[1]: *** [CMakeFiles/Makefile2:326: utils/run/CMakeFiles/hyprland-run.dir/all] Error 2
hyprland-guiutils> [100%] Linking CXX executable hyprland-welcome
hyprland-guiutils> /nix/store/8lkj89binl0xhraqxb8bwmv0q4p3pnlr-binutils-2.46/bin/ld.bfd: /nix/store/a7rhw8mw37my5c3dl0d7k06dqcpmlp1i-hyprtoolkit-0.5.4/lib/libhyprtoolkit.so: undefined reference to `std::basic_format_arg<std::basic_format_context<std::__format::_Sink_iter<char>, char> >::_M_handle_unrecognized() const@GLIBCXX_3.4.36'
hyprland-guiutils> collect2: error: ld returned 1 exit status
hyprland-guiutils> make[2]: *** [utils/welcome/CMakeFiles/hyprland-welcome.dir/build.make:107: utils/welcome/hyprland-welcome] Error 1
hyprland-guiutils> make[1]: *** [CMakeFiles/Makefile2:294: utils/welcome/CMakeFiles/hyprland-welcome.dir/all] Error 2
hyprland-guiutils> make: *** [Makefile:156: all] Error 2
error: Cannot build '/nix/store/abngbawmffp514gcqndwkcwzznp31cpm-hyprland-guiutils-0.2.2+date=2026-07-20_a16ad89.drv'.
       Reason: builder failed with exit code 2.
       Output paths:
         /nix/store/xwv7azkdpianpn0wjy2r539lsknfblz0-hyprland-guiutils-0.2.2+date=2026-07-20_a16ad89
error: Cannot build '/nix/store/xhypkly22088w0j9s7pjfxyk198isxs1-hyprland-0.56.2+date=2026-08-05_efb5099.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/1idd9v75s8m1vw4rrdi5qcihl76ryk15-hyprland-0.56.2+date=2026-08-05_efb5099-dev
         /nix/store/hx74xp436yi1rzihgim0nwcg703cb2fa-hyprland-0.56.2+date=2026-08-05_efb5099
         /nix/store/w932nr02fapn87h7wm4wfybywkgnf7zc-hyprland-0.56.2+date=2026-08-05_efb5099-man
error: Cannot build '/nix/store/xhypkly22088w0j9s7pjfxyk198isxs1-hyprland-0.56.2+date=2026-08-05_efb5099.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/1idd9v75s8m1vw4rrdi5qcihl76ryk15-hyprland-0.56.2+date=2026-08-05_efb5099-dev
         /nix/store/hx74xp436yi1rzihgim0nwcg703cb2fa-hyprland-0.56.2+date=2026-08-05_efb5099
         /nix/store/w932nr02fapn87h7wm4wfybywkgnf7zc-hyprland-0.56.2+date=2026-08-05_efb5099-man
error: Cannot build '/nix/store/v21836gd6y8zsf70dq8qib7ax25j1qi9-desktops.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/7l2yshrs46spnl80yi9vqaiafz0dpfq9-desktops
error: Cannot build '/nix/store/hl3i0qdbfk0r5drzjzch05bjrd4i07aa-ensure-all-wrappers-paths-exist.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/hjlvi6p30lnm8y5dnh8n9ny56v4yja3p-ensure-all-wrappers-paths-exist
error: Cannot build '/nix/store/h403y34q9ndng2fwwcbbx1ihg8kg9r3q-hyprland-0.56.2+date=2026-08-05_efb5099_fish-completions.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/2rxgvpl8cnz8br2igb96v37wym74wc7k-hyprland-0.56.2+date=2026-08-05_efb5099_fish-completions
error: Cannot build '/nix/store/np6gpw70i0h2php826h84b44999clycm-security-wrapper-Hyprland-x86_64-unknown-linux-musl.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/gyjqjs5i8clvw3ab0cd96l6ab8cin1qm-security-wrapper-Hyprland-x86_64-unknown-linux-musl
error: Cannot build '/nix/store/xf13x9ywjdc88ln983n9m5mhbsyw7ni4-system-path.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/wv2gyawgy2ivn5q7dgw7hzh6hp602cw2-system-path
error: Cannot build '/nix/store/vavzh73sq2igrs384j08rprzdxzvdf44-xdg-desktop-portal-hyprland-1.4.1+date=2026-08-04_b653ab5.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/nqj8s34agk67lmf3yb0pmczzrvm2camh-xdg-desktop-portal-hyprland-1.4.1+date=2026-08-04_b653ab5
error: Cannot build '/nix/store/rkfv5j3pqmmpm1l62jw46g88qmlfrb15-nixos-system-miyabi-26.05.20260812.9f78f44.drv'.
       Reason: 1 dependency failed.
       Output paths:
         /nix/store/ivqw7c1vaib1si47v31fmnyx1d56rf2v-nixos-system-miyabi-26.05.20260812.9f78f44
Command 'nix --extra-experimental-features 'nix-command flakes' build --print-out-paths '.#nixosConfigurations."miyabi".config.system.build.toplevel' --no-link --print-build-logs' returned non-zero exit status 1.

I acknowledge that:

• I have searched all (open and closed) discussions and issues and my problem is not there.

• I have read the Code of Conduct and agree to follow it.

• I wrote this request with my own hands, my own keyboard, and in my own words.

[vaxerski]

this looks like a gcc mismatch, @fufexan

[fufexan]

Fixed on main. Not on 0.56.2. Either don't use the newer nixpkgs with 0.56.2 until the next bump, or switch to the main branch.