Hi, 

`guix pull` fails with the following error:

```

guix pull: error: You found a bug: the program
'/gnu/store/12x6qgb107f3s9vj6w76z9419qcdc9b5-compute-guix-derivation'
failed to compute the derivation for Guix (version:
"2b9b4b1fe368fb1745c4150adbb8754948326c95"; system: "x86_64-linux";
host version: "6f00fb75ca52ae112a73f2fbc6d8f6269a8db5f6"; pull-version: 1).
Please report it by email to <bug-guix@gnu.org>.

```

Please find attached the log file of the failed session.

Best

Xero