cabal dies on NixOS in KVM

I set up a NixOS system on KVM and installed the haskelPlatform package. Everything works fine, ghci works fine, but cabal dies without any helpful error message: [michas@nix:~]$ type -a cabal cabal is /run/current-system/sw/bin/cabal [michas@nix:~]$ cabal --version cabal-install version 1.16.0.2 using version 1.16.0 of the Cabal library [michas@nix:~]$ cabal update Downloading the latest package list from hackage.haskell.org Aborted [michas@nix:~]$ cabal update -v3 Downloading the latest package list from hackage.haskell.org Sending: GET /packages/archive/00-index.tar.gz HTTP/1.1 Host: hackage.haskell.org User-Agent: cabal-install/1.16.0.2 Creating new connection to hackage.haskell.org Received: HTTP/1.1 200 OK Date: Thu, 19 Sep 2013 17:28:04 GMT Server: Apache/2.2.9 (Debian) mod_python/3.3.1 Python/2.5.2 Last-Modified: Thu, 19 Sep 2013 16:01:27 GMT ETag: "1888006-641488-4e6beaa9663c0" Accept-Ranges: bytes Content-Length: 6558856 Content-Type: application/x-tar Content-Encoding: x-gzip Downloaded to /home/michas/.cabal/packages/hackage.haskell.org/00-index.tar.gz Aborted [michas@nix:~]$ strace cabal update [...] close(9) = 0 lstat("/home/michas/.cabal/packages/hackage.haskell.org/00-index.tar5861.tmp", {st_mode=S_IFREG|0644, st_size=104366080, ...}) = 0 rename("/home/michas/.cabal/packages/hackage.haskell.org/00-index.tar5861.tmp", "/home/michas/.cabal/packages/hackage.haskell.org/00-index.tar") = 0 --- SIGVTALRM {si_signo=SIGVTALRM, si_code=SI_TIMER, si_pid=0, si_uid=18, si_value=0} --- rt_sigreturn() = 0 --- SIGVTALRM {si_signo=SIGVTALRM, si_code=SI_TIMER, si_pid=0, si_uid=0, si_value=0} --- rt_sigreturn() = 139968722321408 stat("/home/michas/.cabal/packages/hackage.haskell.org/00-index.cache", {st_mode=S_IFREG|0644, st_size=1058094, ...}) = 0 stat("/home/michas/.cabal/packages/hackage.haskell.org/00-index.tar", {st_mode=S_IFREG|0644, st_size=104366080, ...}) = 0 stat("/home/michas/.cabal/packages/hackage.haskell.org/00-index.cache", {st_mode=S_IFREG|0644, st_size=1058094, ...}) = 0 --- SIGVTALRM {si_signo=SIGVTALRM, si_code=SI_TIMER, si_pid=0, si_uid=0, si_value=0} --- rt_sigreturn() = 0 rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0 tgkill(5861, 5861, SIGABRT) = 0 --- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=5861, si_uid=1000} --- +++ killed by SIGABRT +++ Aborted [michas@nix:~]$ The VM has no swap, but 2GB of RAM. No hints in dmesg. Any idea what is going on? (On another NixOS installation on a VirtualBox-based VM this works without problems.)