Bash patch 42 sha checksum is wrong

[TLATER]

Very new user here, so excuse me if I am just misinformed.

In /pkgs/shells/bash

(patch "042" "06a90k0p6bqc4wk2dsmapna69124an76xvlnlj3xm497vci968dc")

fixes a recurring sha error when trying to install bash 43.

[edolstra]

On what Nixpkgs version? On the current master and release-15.09, this should not happen, because the patch will be fetched from tarballs.nixos.org:

$ nix-build -A bash.patches.41 --check
checking path(s) ‘/nix/store/pdwz581jbf27cm2lvmngrhnrbyd5bv7a-bash43-042’

trying http://tarballs.nixos.org/sha256/1bwhssay66n75fy0pxcrwbm032s6fvfg7dblzbrzzn5k38a56nmp
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed                                                                                                                 
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0                                                                                                                
100  1535  100  1535    0     0   7344      0 --:--:-- --:--:-- --:--:--  562k                                                                                                                
/nix/store/pdwz581jbf27cm2lvmngrhnrbyd5bv7a-bash43-042                                                                                                                                        

[spwhitt]

I'm seeing this problem on Darwin master, nixos-unstable, etc. Also, your checking command gives me this:

nix-build -A bash.patches.41 --check
these derivations will be built:
  /nix/store/q87s5jf63rqs1a3vcz8g5zq043ngimxr-bash43-042.drv
error: some outputs of ‘/nix/store/q87s5jf63rqs1a3vcz8g5zq043ngimxr-bash43-042.drv’ are not valid, so checking is not possible

[edolstra]

What if you remove the --check flag?

[spwhitt]

It suddenly started working for me. If you did something, thank you!

[vcunat]

Context: there've been many related reports, all stemming from upstream updating this patch in-place.

[TLATER]

I am on the nixpkgs-unstable channel, I assume that's on the master branch:

$ nix-channel --list
nixpkgs http://nixos.org/channels/nixpkgs-unstable

I am currently running this from a manually compiled nix (1.10) for bootstrapping and not from nix OS, that's probably worth mentioning.

[peti]

Fixed by #11456.

[peti]

@TLATER, the unstable channel lags behind master, sometimes by several days or weeks, even.