• built on NixOS
• /nix/store/y5hjzpxdr0r4qxjkknmlcqm19rg0nkd0-bison-3.2/bin/bison passed the binary check.
• /nix/store/y5hjzpxdr0r4qxjkknmlcqm19rg0nkd0-bison-3.2/bin/yacc passed the binary check.
• 2 of 2 passed binary check by having a zero exit code.
• 0 of 2 passed binary check by having the new version present in output.
• found 3.2 with grep in /nix/store/y5hjzpxdr0r4qxjkknmlcqm19rg0nkd0-bison-3.2
• directory tree listing: https://gist.github.com/c245c562c4d0283a2c82bad472a988b9
• du listing: https://gist.github.com/c47702f26251f09c731e96af743f9c16

Outpath difference report
82738 total rebuild paths

26788 package rebuilds

26640 x86_64-linux rebuilds
20914 i686-linux rebuilds
14922 x86_64-darwin rebuilds
20262 aarch64-linux rebuilds

First ten rebuilds by attrpath
AMB-plugins
AgdaSheaves
AgdaStdlib
CoinMP
DisnixWebService
EBTKS
EmptyEpsilon
FIL-plugins
Fabric
LASzip

Either download from Cachix:

nix-store -r /nix/store/y5hjzpxdr0r4qxjkknmlcqm19rg0nkd0-bison-3.2 \
  --option binary-caches 'https://cache.nixos.org/ https://r-ryantm.cachix.org/' \
  --option trusted-public-keys '
  r-ryantm.cachix.org-1:gkUbLkouDAyvBdpBX0JOdIiD2/DP1ldF3Z3Y6Gqcc4c=
  cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
  '

(r-ryantm's Cachix cache is only trusted for this store-path realization.)

Or, build yourself:

nix-build -A bison https://github.com/r-ryantm/nixpkgs/archive/43af73d701e2311370c049c3e69057352539e91c.tar.gz

After you've downloaded or built it, look at the files and if there are any, run the binaries:

ls -la /nix/store/y5hjzpxdr0r4qxjkknmlcqm19rg0nkd0-bison-3.2
ls -la /nix/store/y5hjzpxdr0r4qxjkknmlcqm19rg0nkd0-bison-3.2/bin