Guix package failure

[Andreas Enge]

Currently, installing software fails for me, be it updates or new
installations. For instance,
   guix package -u mplayer
from latest git fails with

Backtrace:
In ice-9/boot-9.scm:
 157: 14 [catch #t #<catch-closure 15b75c0> ...]
In unknown file:
   ?: 13 [apply-smob/1 #<catch-closure 15b75c0>]
In ice-9/boot-9.scm:
  63: 12 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 11 [eval # #]
In ice-9/boot-9.scm:
2401: 10 [save-module-excursion #<procedure 15d4800 at ice-9/boot-9.scm:4045:3 
()>]
4050: 9 [#<procedure 15d4800 at ice-9/boot-9.scm:4045:3 ()>]
1724: 8 [%start-stack load-stack ...]
1729: 7 [#<procedure 15ea9c0 ()>]
In unknown file:
   ?: 6 [primitive-load 
"/gnu/store/0ssz8rgy8z3jfq071k0vvns1kla4chjp-profile-builder"]
In ice-9/eval.scm:
 432: 5 [eval # ()]
In 
/gnu/store/br1sapf2c4hz90v2nvhi0rkxanrk86yk-module-import/guix/build/union.scm:
 134: 4 [union-of-directories 
"/gnu/store/yphxri93bx6mmhqpz9c4yxvp2yyyzn1x-profile" ...]
In srfi/srfi-1.scm:
 619: 3 [for-each #<procedure 18d2d60 at 
/gnu/store/br1sapf2c4hz90v2nvhi0rkxanrk86yk-module-import/guix/build/union.scm:134:16
 (dir)> ...]
In 
/gnu/store/br1sapf2c4hz90v2nvhi0rkxanrk86yk-module-import/guix/build/union.scm:
 136: 2 [#<procedure 18d2d60 at 
/gnu/store/br1sapf2c4hz90v2nvhi0rkxanrk86yk-module-import/guix/build/union.scm:134:16
 (dir)> #]
  37: 1 [files-in-directory #]
In unknown file:
   ?: 0 [opendir ("m4" "/gnu/store/3a66h65pj9rfmgh38wngas7qjagbl39s-m4-1.4.17")]

ERROR: In procedure opendir:
ERROR: Wrong type (expecting string): ("m4" 
"/gnu/store/3a66h65pj9rfmgh38wngas7qjagbl39s-m4-1.4.17")
builder for `/gnu/store/p9jq9v14yhzzbahwambkxhnjsyx5py2v-profile.drv' failed 
with exit code 1
guix package: error: build failed: build of 
`/gnu/store/p9jq9v14yhzzbahwambkxhnjsyx5py2v-profile.drv' failed

I suppose nobody else has experienced this? Do you have an idea what could be
going wrong?

After the failure of the operation, the directory 
/gnu/store/yphxri93bx6mmhqpz9c4yxvp2yyyzn1x-profile exists and is empty.

Andreas