Like this:

[root@stan:~]# ll /nix/store/4f9p4af244fvc5sbw1np0px8yp039z98-nova-2011.2/lib/python2.7/site-packages/
total 32
lrwxrwxrwx  1 root nixbld    59 Jun 20 11:51 bin -> /nix/store/4f9p4af244fvc5sbw1np0px8yp039z98-nova-2011.2/bin
dr-xr-xr-x 17 root nixbld  4096 Jan  1  1970 nova
dr-xr-xr-x  2 root nixbld  4096 Jan  1  1970 nova-2011.2-py2.7.egg-info
-rw-r--r--  2 root root       0 Jun 20 13:57 nova-iptables.lock.lock
-r--r--r--  1 root nixbld 10523 Jan  1  1970 run_tests.py
-r--r--r--  1 root nixbld 10449 Jan  1  1970 run_tests.pyc
-rw-r--r--  2 root root       0 Jun 20 13:57 stan-6de98700.18290
-rw-r--r--  1 root root       0 Jun 20 14:00 stan-7bda9700.18493
-rw-r--r--  1 root root       0 Jun 20 14:04 stan-8097b700.18687
-rw-r--r--  1 root root       0 Jun 20 13:57 stan-98e40700.18342
-rw-r--r--  1 root root       0 Jun 20 14:04 stan-b54ac700.18731
-rw-r--r--  1 root root       0 Jun 20 13:57 stan-e4e41700.18368

Submitted by Eelco Dolstra on 20 June 2011 at 14:06