Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [error: Installed (but unpackaged) file(s) found:
   /etc/grub.d/35_fwupd]: [There were installed but unpackaged files found.]

Issue: The build failed because there were some files that were installed during the build but unpackaged. Either the file was not ignored in the %files section of the spec file or the file was not added in the %files section to be packaged.
Resolution: Update the %files section of the spec file to accommodate all the files created during the build process by either ignoring them or including them to be packaged or updating the %install part of the spec file to get rid of unwanted files. 