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.
Among other things fixes build failure on gcc-10:
ld: CMakeFiles/xsuspender.dir/xsuspender.c.o:(.bss+0x8): multiple definition of
`queued_entries'; CMakeFiles/xsuspender.dir/config.c.o:(.bss+0x8): first defined here