Error installing package, since new 'info-dir' support.

[mhw]

I got this error while trying to install a package.  It's the first time
I've tried to install something from guix with the new 'info-dir'
support.  Any ideas?

      Mark


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mhw:~/guix-core-updates$ ./pre-inst-env guix package -i gdb
The following package will be upgraded:     
   gdb-7.8      out     /gnu/store/sx4fh7khji47kf3xf1bvn4sbd25i82sl-gdb-7.8

substitute-binary: guix substitute-binary: warning: while fetching 
http://hydra.gnu.org/nix-cache-info: server is unresponsive
substitute-binary: guix substitute-binary: warning: try `--no-substitutes' if 
the problem persists
The following derivations will be built:
   /gnu/store/779ir6xq55gs87f8r36advja9fkdy05s-profile.drv
   /gnu/store/kdls11adbvx4px0383lc7s1z8rnx03vi-info-dir.drv
Backtrace:
In ice-9/boot-9.scm:
 157: 12 [catch #t #<catch-closure 96ac950> ...]
In unknown file:
   ?: 11 [apply-smob/1 #<catch-closure 96ac950>]
In ice-9/boot-9.scm:
  63: 10 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 9 [eval # #]
In ice-9/boot-9.scm:
2401: 8 [save-module-excursion #<procedure 96bdc00 at ice-9/boot-9.scm:4045:3 
()>]
4050: 7 [#<procedure 96bdc00 at ice-9/boot-9.scm:4045:3 ()>]
1724: 6 [%start-stack load-stack ...]
1729: 5 [#<procedure 96c3498 ()>]
In unknown file:
   ?: 4 [primitive-load 
"/gnu/store/7fwy10kwr2pa8wvarq0fpia64a8x781m-info-dir-builder"]
In ice-9/eval.scm:
 387: 3 [eval # ()]
In srfi/srfi-1.scm:
 646: 2 [append-map #<procedure info-files (a)> #]
 576: 1 [map #<procedure info-files (a)> #]
In unknown file:
   ?: 0 [scm-error wrong-type-arg "map" "Not a list: ~S" (#f) #f]

ERROR: In procedure scm-error:
ERROR: In procedure map: Not a list: #f
builder for `/gnu/store/kdls11adbvx4px0383lc7s1z8rnx03vi-info-dir.drv' failed 
with exit code 1
cannot build derivation 
`/gnu/store/779ir6xq55gs87f8r36advja9fkdy05s-profile.drv': 1 dependencies 
couldn't be built
guix package: error: build failed: build of 
`/gnu/store/779ir6xq55gs87f8r36advja9fkdy05s-profile.drv' failed
mhw:~/guix-core-updates$ 
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