> Some software (rightly or wrongly) tries to build with "lex" and "yacc" .  Guix does not provide these.
> Instead we have "flex" and "bison".  Most operating systems have symbolic links lex -> flex and yacc -> bison.
> Shouldn't we provide these too?

I guess this should solve the problem (untested):

(inputs
  `(("lex" ,flex)
    ("yacc" ,bison)
    ...))