[Nix-dev] Why stdenv-updates branch? (was: Distinction between `gmp' and `gmpxx')

[Peter Simons]

Hi Ludovic,

 > I made this change in r16425 [...]

thank you.

 > [...] in `stdenv-updates' (we can't do it in `trunk' since GCC
 > depends on it.)

I have never really understood the rationale behind the stdenv-updates
branch. Why can't we check this change into trunk? What's the problem
with changing a package that GCC depends on?

Take care,
Peter