Hello, The emacs-ebib package has been updated recently to depend upon new functionality in the emacs-parsebib package, however there has not been a release to allow emacs-parsebib to be updated, causing things to break on a purely-guix install of these packages. There has not been an upstream release tag created for emacs-parsebib since 2021-12-08 (which was version 3.1.0). However, 11 days ago, the actual library's version info was bumped to 4.1.0. This indicates that there was a breaking change (which there apparently was). I have commented on the commit bumping the internal version number[1] and I opened an issue to the same effect[2]. I am also in the process of recompiling the packages in my declaration that rely on emac-parsebib to rely on the commit mentioned above. So long as that works, I'll send a patch updating the Guix version of this package to this more-recent 'release' of emacs-ebib. [1]: https://github.com/joostkremers/parsebib/commit/185239020f878cfbe1036270e6c3d1026ba8f255 [2]: https://github.com/joostkremers/parsebib/issues/24 -- Christopher Rodriguez