Partial build log
this derivation will be built:
/nix/store/bn9yl0bh2y4nnhwgnh0h5n0x85mrfq0n-midi_matrix.lv2-0.30.0.tar.xz.drv
building '/nix/store/02k1f1xvv8yjifawrfrg4smw5nikcprk-midi_matrix.lv2-0.30.0.tar.xz.drv'...
midi_matrix.lv2> trying https://git.open-music-kontrollers.ch/lv2/midi_matrix.lv2/snapshot/midi_matrix.lv2-0.30.0.tar.xz
midi_matrix.lv2> % Total % Received % Xferd Average Speed Time Time Time Current
midi_matrix.lv2> Dload Upload Total Spent Left Speed
midi_matrix.lv2> 0 1551 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
midi_matrix.lv2> curl: (22) The requested URL returned error: 404
midi_matrix.lv2> error checking the existence of file:///dev/null/sha256/1nwmfxdzk4pvbwcgi3d7v4flqc10bmi2fxhrhrpfa7cafqs40ib6:
midi_matrix.lv2> curl: (37) Couldn't open file /dev/null/sha256/1nwmfxdzk4pvbwcgi3d7v4flqc10bmi2fxhrhrpfa7cafqs40ib6
midi_matrix.lv2> error: cannot download midi_matrix.lv2-0.30.0.tar.xz from any mirror
error: builder for '/nix/store/02k1f1xvv8yjifawrfrg4smw5nikcprk-midi_matrix.lv2-0.30.0.tar.xz.drv' failed with exit code 1
error: