The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
Without the change build fails on upstream gcc-10 as:
ld: unflasm.o:/build/source/unflasm.c:32: multiple definition of
`swfVersion'; flasm.o:/build/source/flasm.c:36: first defined here