### Please describe the problem.
When running configure, the system runs out of memory:

[[https://kojipkgs.fedoraproject.org//work/tasks/1587/10431587/build.log]]

built with versions from:

[[https://kojipkgs.fedoraproject.org//work/tasks/1587/10431587/root.log]]

### What steps will reproduce the problem?
Rebuilding on koji. Also occurs in mock. Haven't tried a naked build (yet).

### What version of git-annex are you using? On what operating system?
Currently, 5.20141203. Newest snapshot requires deps not yet packaged in Fedora.

### Please provide any additional information below.

[[!format sh """
+ ./Setup configure --prefix=/usr --libdir=/usr/lib --docdir=/usr/share/doc/git-annex '--libsubdir=$compiler/$pkgid' '--datasubdir=$pkgid' --ghc --enable-executable-dynamic '--ghc-options= -optc-O2 -optc-g -optc-pipe -optc-Wall -optc-Werror=format-security -optc-Wp,-D_FORTIFY_SOURCE=2 -optc-fexceptions -optc-fstack-protector-strong -optc--param=ssp-buffer-size=4 -optc-grecord-gcc-switches -optc-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -optc-m32 -optc-march=i686 -optc-mtune=atom -optc-fasynchronous-unwind-tables  -optl-Wl,-z,relro'
  checking version...fatal: Not a git repository (or any of the parent directories): .git
 5.20141203
  checking UPGRADE_LOCATION... not available
  checking git... yes
  checking git version... 2.4.6
  checking cp -a... yes
  checking cp -p... yes
  checking cp --preserve=timestamps... yes
  checking cp --reflink=auto... yes
  checking xargs -0... yes
  checking rsync... yes
  checking curl... yes
  checking wget... no
  checking bup... no
  checking nice... yes
  checking ionice... yes
  checking nocache... no
  checking gpg... gpg2
  checking lsof... not available
  checking git-remote-gcrypt... not available
  checking ssh connection caching... yes
  checking sha1... sha1sum
  checking sha256... sha256sum
  checking sha512... sha512sum
  checking sha224... sha224sum
  checking sha384...Setup: out of memory (requested 1048576 bytes)
"""]]
