After comand:
guix package -i cmus
I got:
The following package will be installed:
   cmus    2.7.1    /gnu/store/3gjxzj1ciwyli90jcy39biwwabf060hh-cmus-2.7.1

The following derivations will be built:
   /gnu/store/dwaykvv8hzypd6ycd3s9rknnj3bsnzhw-profile.drv
   /gnu/store/02kscspiqhbyylgwmshv9s6bnxrjq18r-ca-certificate-bundle.drv
   /gnu/store/7n0m5prd1ibpqi0pi9rfivpcrbmvbycl-info-dir.drv
   /gnu/store/00xykvx1rxqr1igrbbmgz7iqfmfif6br-v1.4.0.tar.bz2.drv
   /gnu/store/idr4f008bx1fvhqf6z53n4bpp0am7kha-libcue-1.4.0.drv
   /gnu/store/g5qjx377a7jwkxg8f4kxffxm4zli85dd-cmus-2.7.1.drv

Starting download of
/gnu/store/j056cc105z3sp8m41pgry3srav795syi-v1.4.0.tar.bz2
From https://github.com/lipnitsk/libcue/archive/v1.4.0.tar.bz2...
ERROR: download failed "
https://github.com/lipnitsk/libcue/archive/v1.4.0.tar.bz2" 404 "Not Found"
failed to download
"/gnu/store/j056cc105z3sp8m41pgry3srav795syi-v1.4.0.tar.bz2" from "
https://github.com/lipnitsk/libcue/archive/v1.4.0.tar.bz2"
builder for
`/gnu/store/00xykvx1rxqr1igrbbmgz7iqfmfif6br-v1.4.0.tar.bz2.drv' failed to
produce output path
`/gnu/store/j056cc105z3sp8m41pgry3srav795syi-v1.4.0.tar.bz2'
cannot build derivation
`/gnu/store/idr4f008bx1fvhqf6z53n4bpp0am7kha-libcue-1.4.0.drv': 1
dependencies couldn't be built
cannot build derivation
`/gnu/store/g5qjx377a7jwkxg8f4kxffxm4zli85dd-cmus-2.7.1.drv': 1
dependencies couldn't be built
cannot build derivation
`/gnu/store/dwaykvv8hzypd6ycd3s9rknnj3bsnzhw-profile.drv': 1 dependencies
couldn't be built
guix package: error: build failed: build of
`/gnu/store/dwaykvv8hzypd6ycd3s9rknnj3bsnzhw-profile.drv' failed