building /gnu/store/vx8a40w032nv913janngc0r210vdlz18-compute-guix-derivation.drv...
Backtrace:
          13 (primitive-load "/gnu/store/xvdcfn6zr3fjxd2yjzizn24acliqxsrj-compute-guix-derivation")
In ice-9/eval.scm:
    155:9 12 (_ _)
    159:9 11 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-u?> ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))
In ice-9/boot-9.scm:
    152:2 10 (with-fluid* _ _ _)
    152:2  9 (with-fluid* _ _ _)
In ./guix/store.scm:
  2168:24  8 (run-with-store #<store-connection 256.99 7efd7913f140> _ #:guile-for-build _ #:system _ #:target _)
   1996:8  7 (_ _)
In ./guix/gexp.scm:
   299:22  6 (_ _)
   1180:2  5 (_ _)
   1046:2  4 (_ _)
    892:4  3 (_ _)
In ./guix/store.scm:
  2053:12  2 (_ #<store-connection 256.99 7efd7913f140>)
   1401:5  1 (map/accumulate-builds #<store-connection 256.99 7efd7913f140> #<procedure 7efd76c252d0 at ./guix/stor?> ?)
  1417:15  0 (_ #<store-connection 256.99 7efd7913f140> _ _)

./guix/store.scm:1417:15: ERROR:
  1. &store-protocol-error:
      message: "`/usr/bin/guix substitute' died unexpectedly"
      status: 1
Computing Guix derivation for 'x86_64-linux'...  guix pull: error: You found a bug: the program '/gnu/store/xvdcfn6zr3fjxd2yjzizn24acliqxsrj-compute-guix-derivation'
failed to compute the derivation for Guix (version: "998d89ba20121e87664129890a805c91061baaa7"; system: "x86_64-linux";
host version: "1.3.0"; pull-version: 1).
Please report the COMPLETE output above by email to <bug-guix@gnu.org>.