Problem with spaces in path name

I'm having a problem building NPSR in Windows XP when the path name 
contains spaces.  Changing the path to one without spaces solves the 
problem, but I need to be able to use paths with spaces.  The path below 
contains "Documents and Settings", which is causing the problem seen in 
the output below.  I'm using MozillaBuild 1.3.  Thank you for any help.

- Jon


$ make
cd config; make -j1 export
make[1]: Entering directory `/c/Documents and Settings/leighton/develo
pment/firefox/source/tcp/3.0.5/config_test/nspr_test/config'
cl -Fonow.obj -c      -W3 -nologo -GF -Gy -Od -MD -Z7   -UNDEBUG -DDEB
UG_leighton -UWINNT  -DDEBUG=1 -DXP_PC=1 -DWIN32=1 -D_DEBUG=1 -DWIN95=
1 -D_PR_GLOBAL_THREADS_ONLY=1 -D_X86_=1  -DFORCE_PR_LOG   /c/Documents
and Settings/leighton/development/firefox/source/tcp/3.0.5/config_test
/nsprpub/config/now.c
cl : Command line warning D9024 : unrecognized source file type 'c:/Do
cuments', object file assumed
cl : Command line warning D9027 : source file 'c:/Documents' ignored
cl : Command line warning D9024 : unrecognized source file type 'and', 
object file assumed
cl : Command line warning D9027 : source file 'and' ignored
now.c
c1 : fatal error C1083: Cannot open source file: 'Settings/leighton/de
velopment/firefox/source/tcp/3.0.5/config_test/nsprpub/config/now.c':
No such file or directory
make[1]: *** [now.obj] Error 2
make[1]: Leaving directory `/c/Documents and Settings/leighton/develop
ment/firefox/source/tcp/3.0.5/config_test/nspr_test/config'
make: *** [export] Error

$