nix fails to build against lowdown-1.4.0: error: 'lowdown_opts' has no non-static data member named 'cols'

[trofi]

Describe the bug

https://github.com/kristapsdz/lowdown/releases/tag/VERSION_1_4_0 is out and nixpkgs can't update to it as nix fails to build against it as:

nix-cmd> [2/17] Compiling C++ object libnixcmd.so.p/markdown.cc.o
nix-cmd> FAILED: libnixcmd.so.p/markdown.cc.o
nix-cmd> g++ -Ilibnixcmd.so.p -I. -I.. -I/nix/store/b0bnrk5lacxbpgxgnc28r8q3wcazrgxj-nix-util-2.26.0pre-dev/include/nix -I/nix/store/cxnynq9ykyj4xxv6wf6dw7r0aw5x6n9k-libarchive-3.7.7-dev/include -I/nix/store/bfgjwkcb8snkizx578rzdahi75m8zyh4-nlohmann_json-3.11.3/include -I/nix/store/3sx8bq3sip6j2nv1m5xx4gbdp33v7iy6-nix-store-2.26.0pre-dev/include/nix -I/nix/store/sih2dgqzvsbv7p510lkfmas7s7wbsl4j-nix-fetchers-2.26.0pre-dev/include/nix -I/nix/store/68p8s20fsiiakj7nys7grbaixfnhsdzs-nix-expr-2.26.0pre-dev/include/nix -I/nix/store/gw7wknhzhfzzj9zww2kyi5xrzgf1ndki-boehm-gc-8.2.8-dev/include -I/nix/store/3jwb9j4vnsk5saq3wfyyp9il3mhs41l9-nix-flake-2.26.0pre-dev/include/nix -I/nix/store/8nwjvmq7m48v8g646jrxkikv6x47bc3m-nix-main-2.26.0pre-dev/include/nix -I/nix/store/rb0hzsw5wc1a7daizhpj824mbxlvijrq-lowdown-1.4.0-dev/include -I/nix/store/m388ywpk53fsp8r98brfd7nf1f5sskv0-editline-1.17.1-dev/include -fdiagnostics-color=always -D_GLIBCXX_ASSERTIONS=1 -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=c++2a -include config-util.hh -include config-store.hh -include config-expr.hh -include config-main.hh -include config-cmd.hh -Wdeprecated-copy -Werror=suggest-override -Werror=switch -Werror=switch-enum -Werror=unused-result -Wignored-qualifiers -Wimplicit-fallthrough -Wno-deprecated-declarations -O3 -fPIC -pthread -std=c++2a -std=c++2a -std=c++2a -std=c++2a -std=c++2a -std=c++2a -MD -MQ libnixcmd.so.p/markdown.cc.o -MF libnixcmd.so.p/markdown.cc.o.d -o libnixcmd.so.p/markdown.cc.o -c ../markdown.cc
nix-cmd> ../markdown.cc: In function 'std::string nix::doRenderMarkdownToTerminal(std::string_view)':
nix-cmd> ../markdown.cc:28:5: error: 'lowdown_opts' has no non-static data member named 'cols'
nix-cmd>    28 |     };
nix-cmd>       |     ^

It's caused by this change in changelog:

API change (hence the minor version bump): moving terminal-specific members of lowdown_opts into lowdown_opts_term.

.cols is not a part of struct lowdown_opts anymore.

Steps To Reproduce

• update lowdown to 1.4.0 in nixpkgs, like in lowdown: 1.3.2 -> 1.4.0 nixpkgs#368499
• attempt to build nix, for example via nix build --override-input nixpkgs ~/patched-nixpkgs .# -j1 -L

Expected behavior

nix should support lowdown-1.4.0.

Metadata

nix (Nix) 2.25.3 and master branches both fail.

Additional context

Checklist

• checked latest Nix manual (source)
• checked open bug issues and pull requests for possible duplicates

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