I got the same problem.
starting phase `build'
Error: CliError { error: Some(failed to select a version for `clang-sys`.
... required by package `bindgen v0.58.1`
... which is depended on by `dav1d-sys v0.3.4`
... which is depended on by `rav1e v0.4.1 (/tmp/guix-build-rav1e-0.4.1.drv-0/rav1e-0.4.1)`
versions that meet the requirements `^1` are: 1.0.0
the package `clang-sys` links to the native library `clang`, but it conflicts with a previous package which links to `clang` as well:
package `clang-sys v0.29.3`
... which is depended on by `bindgen v0.54.1`
... which is depended on by `aom-sys v0.2.1`
... which is depended on by `rav1e v0.4.1 (/tmp/guix-build-rav1e-0.4.1.drv-0/rav1e-0.4.1)`
failed to select a version for `clang-sys` which could resolve this conflict), exit_code: 101 }
error: in phase 'build': uncaught exception:
%exception #<&invoke-error program: "cargo" arguments: ("cinstall" "--release" "--prefix=/gnu/store/83mfvccy0szp2v9v2qk8xf5wz867ndnx-rav1e-0.4.1") exit-status: 1 term-signal: #f stop-signal: #f>
phase `build' failed after 0.7 seconds
command "cargo" "cinstall" "--release" "--prefix=/gnu/store/83mfvccy0szp2v9v2qk8xf5wz867ndnx-rav1e-0.4.1" failed with status 1