- Update Nixpkgs/NixOS version
- Update `lastModifiedDate` for older versions of flakes
- Add `versionAndBuild` calculation for fetching version and build
- Remove commented out code for fetching version and build
- Update `versionToolPackage` assignment
- Remove `version` and `build` assignments after `versionAndBuild` calculation
- Update `version` and `build` assignments within `versionAndBuild` calculation
- Add output files `"version"` and `"build"` to `versionAndBuild` calculation
- Update `versionTool.defaultPackage.${system}` assignment in `buildInputs`
- Update `vendorSha256` value
- Update `ldflags` value in `docman` build phase
- Add `homepage` field to `meta` attribute for `docman`
- Update `maintainers` field in `meta` attribute for `docman`
- Update `buildInputs` field in `default` devShell