proxmox-backup-client 2.2.1 -> 2.3.1 https://repology.org/metapackage/proxmox-backup-client/versions
attrpath: proxmox-backup-client
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There might already be an open PR for this update:
- proxmox-backup-client: 2.2.1 -> 2.3.1; add man-pages and shell completions
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/215812"