specify makensis path in build script

Build/NullSoftInstaller.hs

@@ -36,7 +36,7 @@ main = do
 		let license = tmpdir </> licensefile
 		mustSucceed "sh" [Param "-c", Param $ "zcat standalone/licences.gz > '" ++ license ++ "'"]
 		writeFile nsifile $ makeInstaller gitannex license
-		mustSucceed "C:\\Program Files\\NSIS\\makensis" [File nsifile]
+		mustSucceed "makensis" [File nsifile]
 	removeFile nsifile -- left behind if makensis fails
   where
 	nsifile = "git-annex.nsi"

standalone/windows/build.sh

@@ -9,7 +9,7 @@ set -e
 HP="/c/Program Files (x86)/Haskell Platform/2012.4.0.0"
 FLAGS="-Webapp -Assistant -XMPP"
 
-PATH="$HP/bin:$HP/lib/extralibs/bin:$PATH"
+PATH="$HP/bin:$HP/lib/extralibs/bin:/c/Program Files (x86)/NSIS:$PATH"
 
 # Run a command in the cygwin environment.
 incygwin () {