The default boost version has been bumped from 1.69 (or 1.75) to 1.77. This is a notice for maintainers that the following packages are now failing to build:

• libpointmatcher @cryptix
• masari @fpletz
• libtorrent-rasterbar-1_1_x @Phreedom
• monotone @7c6f434c monotone: ping boost_170 to fix build #152208
• arc_unpacker @midchildan arc_unpacker: use boost16x #152370
• swiften @Twey Staging next 2021-12-25 #152145
• pivxd @wucke13
• cpp-netlib - more boost downgrades #151202
• particl-core @demyanrogozhin
• nova-filters @magnetophon nova-filters: pin boost #151732
• powerdns @Mic92 @disassembler - more boost downgrades #151202
• uhd3_5 @bjornfor @fpletz @tomberek
• namecoind @infinisil
• libbitcoin - more boost downgrades #151202
• ndn-tools @bertof NDN: fix builds after boost upgrade #152721
• nfd @bertof NDN: fix builds after boost upgrade #152721
• rethinkdb @thoughtpolice @bluescreen303 rethinkdb: pin Boost dep to boost170 #153639
• litecoind @offlinehacker
• wt3 @juliendehos @WilliButz wt: 4.5.0 -> 4.6.1 #152128
• mozart2 @layus mozart2: pin boost to most recent supported version #151576
• librecad @Kiwi @viric - more boost downgrades #151202
• ycmd @rasendubi @cstrahan @LnL7 597743c
• namecoin @infinisil
• emulationstation @edwtjo emulationstation: pin boost 1.69 #172196
• python39Packages.graph-tool @joelmo python3Packages.graph-tool: 2.32 -> 2.43 #151638
• opendungeons
• litecoin @offlinehacker
• colobot @freezeboy colobot: 0.1.12 -> 0.2.0; fixes build #153130
• snapcast @fpletz
• gnuradio3_8Packages.gnuradio @doronbehar @bjornfor @fpletz gnuradio3_8: Fix build with boost177 #151864
• sourcetrail @midchildan sourcetrail: use boost16x #152375
• dashpay
• digikam - digikam: 7.3.0 -> 7.4.0 #151388
• gnuradio3_8Minimal @doronbehar @bjornfor @fpletz
• freecad @viric @gebner @AndersonTorres [staging-next] freecad: use boost169 #151741
• opentoonz @chkno opentoonz: 1.4.0 -> 1.5.0 #151500
• sdrangel @alkeryn sdrangel: pin boost #153316
• pokerth-server @obadz @yegortimoshenko pokerth, pokerth-server: pin to boost16x to fix build #157088
• python39Packages.roboschool @timokau - python.pkgs.roboschool: remove #154998
• python39Packages.scikit-survival
• foundationdb61 @thoughtpolice foundationdb61: pin Boost dep to boost168 #157967
• pokerth @obadz @yegortimoshenko pokerth, pokerth-server: pin to boost16x to fix build #157088
• python38Packages.graph-tool @joelmo - python3Packages.graph-tool: 2.32 -> 2.43 #151638
• python38Packages.roboschool @timokau - python.pkgs.roboschool: remove #154998
• bombono @symphorien bombono: fix build after boost upgrade #151574
• musikcube @aanderse
• gplates - [staging-next] gplates: use boost175 #151505
• mapnik @hrdinka @erictapen - more boost downgrades #151202
• pivx @wucke13
• mirtk @bcdarwin mirtk: pin boost #151596
• slic3r @bjornfor slic3r: use boost172 #153276
• arrayfire @chessai
• ethminer-free @Atemu [staging-next] ethminer: use boost16x #151989
• cryfs cryfs: pin Boost dep to v1.75.0 #152817

A typical fix would involve pinning the package to a specific version (e.g. see #151202)