```
The following tests FAILED:
         29 - fi:iso-8859-1 (Failed)
         37 - ga:iso-8859-1 (Failed)
        106 - th:tis-620 (Failed)
Errors while running CTest
make: *** [Makefile:127: test] Error 8
builder for '/nix/store/7k0970580kzadwpybrrypjdxswh63y5c-uchardet-0.0.7.drv' failed with exit code 2
cannot build derivation '/nix/store/6n22sn3x8sdl6fklyvv91nxpfg27dcm4-mpv-0.32.0.drv': 1 dependencies couldn't be built
building '/nix/store/6i7sagwmqp228r2801j2a2if2mxwwcdf-xsession.drv'...
building '/nix/store/z25l2kpn3g102f5qadafqcmkmxs1sci6-xsession.drv'...
cannot build derivation '/nix/store/14gydj27lfixny1qga3ysrvbqqw7yvir-mpv-with-scripts-0.32.0.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/63nzcv9zs8zw72hn029h5bh7sq7m1dls-system-path.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/gk6qirajwnjnrs0gir8q0hnsk3zqb67f-nixos-system-Studio-1555-NixOS-20.09.2660.da3378c4aaf.drv': 1 dependencies couldn't be built
error: build of '/nix/store/gk6qirajwnjnrs0gir8q0hnsk3zqb67f-nixos-system-Studio-1555-NixOS-20.09.2660.da3378c4aaf.drv' failed
```