Cannot fetch distfiles on a 1.7-preview system

[Jiawei Ye <leafy@xxxxxxxxxxxxxxxxxx>]

Hi,

I have upgraded my box from 1.5-preview to 1.7-preview, and pkgsrc tools 
stopped fetching distfiles.
The error is shown by a vim example:

/usr/pkgsrc/editors/vim$ bmake fetch -d e
=> Required installed package digest>=20010302: digest-20060302 found
===> Skipping vulnerability checks.
WARNING: No /usr/pkgsrc/distfiles/pkg-vulnerabilities file found.
WARNING: To fix, install the pkgsrc/security/audit-packages
WARNING: package and run: ``/usr/pkg/sbin/download-vulnerability-list''.
=> Fetching vim-7.0.tar.bz2

*** Failed target:  /usr/pkgsrc/distfiles/vim/vim-7.0.tar.bz2
*** Failed command: set -e; 
unsorted_sites="ftp://ftp.vim.org/pub/editors/vim/unix/ 
ftp://ftp.fu-berlin.de/misc/editors/vim/unix/ 
ftp://ftp.twics.co.jp/pub/vim/unix/ 
http://ftp.fi.NetBSD.org/pub/NetBSD/packages/distfiles/vim/ 
ftp://ftp.NetBSD.org/pub/NetBSD/packages/distfiles/vim/ 
http://ftp.NetBSD.org/pub/NetBSD/packages/distfiles/vim/ 
ftp://ftp.FreeBSD.org/pub/FreeBSD/distfiles/vim/";; cd 
/usr/pkgsrc/distfiles && /usr/bin/env CHECKSUM=/usr/bin/env\ 
DIGEST=/usr/pkg/bin/digest\ CAT=/bin/cat\ \ \ ECHO=echo\ TEST=/bin/test\ 
\ \ /bin/sh\ /usr/pkgsrc/mk/checksum/checksum CP=/bin/cp ECHO=echo 
FETCH_CMD=/usr/bin/fetch FETCH_BEFORE_ARGS= FETCH_AFTER_ARGS= 
FETCH_RESUME_ARGS= FETCH_OUTPUT_ARGS= MKDIR=/bin/mkdir MV=/bin/mv 
TEST=/bin/test TOUCH=/usr/bin/touch WC=/usr/bin/wc /bin/sh 
/usr/pkgsrc/mk/fetch/fetch -f 
/usr/pkgsrc/editors/vim/../../editors/vim-share/distinfo -d vim 
vim-7.0.tar.bz2 $unsorted_sites
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/editors/vim

Manually fetching the distfiles work. I have tried re-bootstrapping but 
to no avail.

Jiawei Ye