this derivation will be built:
  /nix/store/z0yivw9w699ys9w2dh1vn02fzqjvb7qz-reuse-lint.drv
reuse-lint> # UNUSED LICENSES
reuse-lint> 
reuse-lint> The following licenses are not used:
reuse-lint> * CC-BY-4.0
reuse-lint> 
reuse-lint> # SUMMARY
reuse-lint> 
reuse-lint> * Bad licenses: 0
reuse-lint> * Deprecated licenses: 0
reuse-lint> * Licenses without file extension: 0
reuse-lint> * Missing licenses: 0
reuse-lint> * Unused licenses: CC-BY-4.0
reuse-lint> * Used licenses: CC-BY-SA-4.0, MIT
reuse-lint> * Read errors: 0
reuse-lint> * Invalid SPDX License Expressions: 0
reuse-lint> * Files with copyright information: 64 / 64
reuse-lint> * Files with license information: 64 / 64
reuse-lint> 
reuse-lint> Unfortunately, your project is not compliant with version 3.3 of the REUSE Specification :-(
reuse-lint> 
reuse-lint> 
reuse-lint> # RECOMMENDATIONS
reuse-lint> 
reuse-lint> * Fix unused licenses: At least one of the license text files in 'LICENSES' is
reuse-lint>   not referenced by any file, e.g. by an 'SPDX-License-Identifier' tag. Please
reuse-lint>   make sure that you either tag the accordingly licensed files properly, or
reuse-lint>   delete the unused license text if you are sure that no file or code snippet is
reuse-lint>   licensed as such.
reuse-lint> 
error: Cannot build '/nix/store/z0yivw9w699ys9w2dh1vn02fzqjvb7qz-reuse-lint.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/nly1l5kji99wdsmhh9dvw811j6ynjxiz-reuse-lint
       Last 25 log lines:
       >
       > # SUMMARY
       >
       > * Bad licenses: 0
       > * Deprecated licenses: 0
       > * Licenses without file extension: 0
       > * Missing licenses: 0
       > * Unused licenses: CC-BY-4.0
       > * Used licenses: CC-BY-SA-4.0, MIT
       > * Read errors: 0
       > * Invalid SPDX License Expressions: 0
       > * Files with copyright information: 64 / 64
       > * Files with license information: 64 / 64
       >
       > Unfortunately, your project is not compliant with version 3.3 of the REUSE Specification :-(
       >
       >
       > # RECOMMENDATIONS
       >
       > * Fix unused licenses: At least one of the license text files in 'LICENSES' is
       >   not referenced by any file, e.g. by an 'SPDX-License-Identifier' tag. Please
       >   make sure that you either tag the accordingly licensed files properly, or
       >   delete the unused license text if you are sure that no file or code snippet is
       >   licensed as such.
       >
       For full logs, run:
         nix log /nix/store/z0yivw9w699ys9w2dh1vn02fzqjvb7qz-reuse-lint.drv