downgrading to read lock on `/var/guix/temproots/1572'
locking path `/gnu/store/bp0hyahbn3f60b954rfcz0vqlmc7lhzj-bzip2-1.0.6.tar.gz.drv'
lock acquired on `/gnu/store/bp0hyahbn3f60b954rfcz0vqlmc7lhzj-bzip2-1.0.6.tar.gz.drv.lock'
recursively deleting path `/gnu/store/bp0hyahbn3f60b954rfcz0vqlmc7lhzj-bzip2-1.0.6.tar.gz.drv'
|   /gnu/store/bp0hyahbn3f60b954rfcz0vqlmc7lhzj-bzip2-1.0.6.tar.gz.drv
`/gnu/store/bp0hyahbn3f60b954rfcz0vqlmc7lhzj-bzip2-1.0.6.tar.gz.drv' has hash 
`d9ddde832ca6671a86815f293a4d175cf8abad16146670c6d8030bf1edcd5e85'
linking ‘/gnu/store/bp0hyahbn3f60b954rfcz0vqlmc7lhzj-bzip2-1.0.6.tar.gz.drv’ to 
‘/gnu/store/.links/11ayrpnz22q3v3370rhl2snspy2w2x6klaazh631lrx65j1xxpfr’
lock released on `/gnu/store/bp0hyahbn3f60b954rfcz0vqlmc7lhzj-bzip2-1.0.6.tar.gz.drv.lock'
Backtrace:
          19 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In guix/packages.scm:
  1205:22 18 (thunk)
  1138:25 17 (bag->derivation #<build-daemon 256.97 1826f50> #<<bag…> …)
In srfi/srfi-1.scm:
   592:29 16 (map1 (("source" #<origin "mirror://gnu/guile/guil…>) …))
   592:17 15 (map1 (("pkgconfig" #<package pkg-config@0.29.2 gn…>) …))
In guix/packages.scm:
   926:16 14 (expand-input #<build-daemon 256.97 1826f50> #<package…> …)
   881:14 13 (cache! #<weak-table 255/443> #<package pkg-config@0.2…> …)
In unknown file:
          12 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In guix/packages.scm:
  1205:22 11 (thunk)
  1138:25 10 (bag->derivation #<build-daemon 256.97 1826f50> #<<bag…> …)
In srfi/srfi-1.scm:
   592:29  9 (map1 (("source" #<origin ("http://fossies.org/lin…>) …))
   592:29  8 (map1 (("tar" #<package tar@1.30 gnu/packages/boot…>) …))
   592:29  7 (map1 (("gzip" #<package gzip@1.9 gnu/packages/boo…>) …))
   592:17  6 (map1 (("bzip2" #<package bzip2@1.0.6 gnu/packages…>) …))
In guix/packages.scm:
   926:16  5 (expand-input #<build-daemon 256.97 1826f50> #<package…> …)
   881:14  4 (cache! #<weak-table 255/443> #<package bzip2@1.0.6 gn…> …)
In unknown file:
           3 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In guix/packages.scm:
  1205:22  2 (thunk)
  1138:25  1 (bag->derivation #<build-daemon 256.97 1826f50> #<<bag…> …)
In srfi/srfi-1.scm:
   592:17  0 (map1 (("source" #<origin "https://web.archive.org…>) …))

srfi/srfi-1.scm:592:17: In procedure map1:
Throw to key `srfi-34' with args `(#<condition &nix-protocol-error [message: "error parsing derivation 
`/gnu/store/bp0hyahbn3f60b954rfcz0vqlmc7lhzj-bzip2-1.0.6.tar.gz.drv': expected string `Derive(['" 
status: 1] 7e7f300>)'.
Backtrace:
           9 (primitive-load "/root/.config/guix/current/bin/guix")
In guix/ui.scm:
  1579:12  8 (run-guix-command _ . _)
In ice-9/boot-9.scm:
    829:9  7 (catch _ _ #<procedure 7f0f8aa7e9b8 at guix/ui.scm:611…> …)
    829:9  6 (catch _ _ #<procedure 7f0f8aa7e9d0 at guix/ui.scm:729…> …)
    829:9  5 (catch _ _ #<procedure 7f0f876e73d0 at guix/scripts/pu…> …)
In guix/scripts/pull.scm:
   505:22  4 (_)
In guix/store.scm:
  1555:24  3 (run-with-store _ _ #:guile-for-build _ #:system _ # _)
In guix/scripts/pull.scm:
    264:2  2 (_ _)
In ice-9/eval.scm:
   191:27  1 (_ #(#(#<directory (build-self) 4a8c640> #<procedu…>) …))
In unknown file:
           0 (scm-error misc-error #f "~A ~S" ("invalid build re…" …) …)

ERROR: In procedure scm-error:
invalid build result (#<derivation 
/gnu/store/c8sw72swmyhy0b25hgbz3b3pjvv73vd6-compute-guix-derivation.drv => 
/gnu/store/5ijqxijd3qgrfwgzncx9jcq9ivqlgkgm-compute-guix-derivation 49b5690> "")

Thanks. Any help would be appreciated.

Vikram