Index: autobuild/scripts/generateMakefile
===================================================================
--- autobuild/scripts/generateMakefile	(revision 912)
+++ autobuild/scripts/generateMakefile	(revision 970)
@@ -111,7 +111,10 @@
 			"mv -f $buildDirVersioned/php/Makefile.tmp $buildDirVersioned/php/Makefile"
 
+		xcachetmp=$TMP/$name
 		local extDll="$buildDirVersioned/php/Release${_TS}/php_${ext}.dll"
 		rule "$extDll" "$buildDirVersioned/php/Makefile" \
-			"cd $buildDirVersioned/php && MAKEFLAGS= ${compiler}${arch}env.cmd nmake.exe /nologo php_${ext}.dll" \
+			"mkdir -p $xcachetmp" \
+			"cd $buildDirVersioned/php && MAKEFLAGS= TMP=$xcachetmp TEMP=$xcachetmp ${compiler}${arch}env.cmd nmake.exe /nologo php_${ext}.dll" \
+			"rmdir $xcachetmp"
 
 		addAllRule "$extDll"