Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:
- built on NixOS
- ran `/nix/store/l2wdk2hk7xr28qc76xdmsnsjlialsrw3-ace-6.4.7/bin/ace_gperf -v` and found version 6.4.7
- found 6.4.7 with grep in /nix/store/l2wdk2hk7xr28qc76xdmsnsjlialsrw3-ace-6.4.7
- found 6.4.7 in filename of file in /nix/store/l2wdk2hk7xr28qc76xdmsnsjlialsrw3-ace-6.4.7
- directory tree listing: https://gist.github.com/df8ae93ced1ab4c4b624c7739501f2a7
