Windows path issues during nmake setup

I seem to be having issues with the POSIX paths that have been implemented in Wireshark 1.6.1. I'm on a Windows XP Pro box.

During the setup, the file is being downloaded. I can clearly see it, but I cannot see it through the cygdrive path. If I run the unzip program using the cygdrive path, I get the same error, but if I go the the libs folder and run the unzip program, it unzips fine. So what am I missing here?

Here is the command output:

C:\wireshark-1.6.1>nmake -f Makefile.nmake setup
Microsoft (R) Program Maintenance Utility Version 9.00.21022.08
Copyright (C) Microsoft Corporation.  All rights reserved.
ERROR: The contents of C:\wireshark-win32-libs-1.6\current_tag.txt is (unknown).
It should be 2011-05-19.
Checking for required applications:
cl: /cygdrive/c/Program Files/Microsoft Visual Studio 9.0/VC/BIN/cl
link: /cygdrive/c/Program Files/Microsoft Visual Studio 9.0/VC/BIN/link
    nmake: /cygdrive/c/Program Files/Microsoft Visual Studio 9.0/VC/BIN/nmak

e
mt: /cygdrive/c/Program Files/Microsoft SDKs/Windows/v6.0A/bin/mt
bash: /usr/bin/bash
bison: /usr/bin/bison
flex: /usr/bin/flex
env: /usr/bin/env
grep: /cygdrive/c/Program Files/Borland/Delphi7/Bin/grep
/usr/bin/find: /usr/bin/find
perl: /usr/bin/perl
C:\Python27\python.exe: /cygdrive/c/Python27/python.exe
sed: /usr/bin/sed
unzip: /cygdrive/c/oracle/product/10.2.0/client_1/bin/unzip
wget: /usr/bin/wget
cd C:\wireshark-win32-libs-1.6
rm -r -f adns-1.0-win32-05ws
rm -r -f c-ares-1.5.3ws
rm -r -f c-ares-1.6.0ws
rm -r -f c-ares-1.7.0-win??ws
rm -r -f c-ares-1.7.1-win??ws
rm -r -f gettext-0.14.5
rm -r -f gettext-runtime-0.17
rm -r -f gettext-runtime-0.17-1
rm -r -f gettext-0.17-1            # win64
rm -r -f glib
rm -r -f gnutls-2.8.1-1
rm -r -f gnutls-2.8.5--win??ws
rm -r -f gnutls-2.10.3--win??ws
rm -r -f gtk2
rm -r -f gtk+
rm -r -f gtk-wimp
rm -r -f kfw-2.5
rm -r -f kfw-3.2.2-ws1
rm -r -f kfw-3.2.2-i386-ws-vc6
rm -r -f libiconv-1.9.1.bin.woe32
rm -r -f lua5.1
rm -r -f lua5.1.4
rm -r -f libsmi-0.4.5
rm -r -f libsmi-0.4.8
rm -r -f nasm-2.00
rm -r -f nasm-2.02
rm -r -f nasm-2.09.08
rm -r -f pcre-6.4
rm -r -f pcre-7.0
rm -r -f portaudio_v19
rm -r -f portaudio_v19_2
rm -r -f user-guide
rm -r -f WpdPack
rm -r -f AirPcap_Devpack_1_0_0_594
rm -r -f AirPcap_Devpack_4_0_0_1480
rm -r -f AirPcap_Devpack_4_1_0_1622
rm -r -f zlib123
rm -r -f zlib-1.2.5
rm -r -f zlib123-dll
rm -r -f upx301w
rm -r -f upx303w
rm -r -f GeoIP-1.4.5ws
rm -r -f GeoIP-1.4.6-win??ws
cd "C:\wireshark-1.6.1"
****** gtk+-bundle_2.22.1-20101227_win32.zip ******
No HTTP proxy specified (http_proxy and HTTP_PROXY are empty).
Downloading gtk+-bundle_2.22.1-20101227_win32.zip into /cygdrive/c/wireshark-win
32-libs-1.6, installing into gtk2
–2011-07-19 09:50:46–  http://anonsvn.wireshark.org/wireshark-win32-libs/tags/
2011-05-19/packages//gtk+-bundle_2.22.1-20101227_win32.zip
Resolving anonsvn.wireshark.org (anonsvn.wireshark.org)… 69.4.231.53
Connecting to anonsvn.wireshark.org (anonsvn.wireshark.org)|69.4.231.53|:80… c
onnected.
HTTP request sent, awaiting response… 200 OK
Length: 24516284 (23M) [application/octet-stream]
Saving to: `gtk+-bundle_2.22.1-20101227_win32.zip'
100%[======================================>] 24,516,284  1.20M/s   in 29s
2011-07-19 09:51:15 (816 KB/s) - `gtk+-bundle_2.22.1-20101227_win32.zip' saved [
24516284/24516284]
Extracting /cygdrive/c/wireshark-win32-libs-1.6/gtk+-bundle_2.22.1-20101227_win3
2.zip into /cygdrive/c/wireshark-win32-libs-1.6/gtk2
unzip:  cannot find either /cygdrive/c/wireshark-win32-libs-1.6/gtk+-bundle_2.22
.1-20101227_win32.zip or /cygdrive/c/wireshark-win32-libs-1.6/gtk+-bundle_2.22.1
-20101227_win32.zip.zip.
ERROR: Couldn't unpack /cygdrive/c/wireshark-win32-libs-1.6/gtk+-bundle_2.22.1-2
0101227_win32.zip
NMAKE : fatal error U1077: 'd:\cygwin\bin\bash.EXE' : return code '0x1'
Stop.
C:\wireshark-1.6.1>