diff -Naur debootstrap/arch deb/arch
--- debootstrap/arch	1969-12-31 19:00:00.000000000 -0500
+++ deb/arch	2011-09-13 23:16:15.679411000 -0400
@@ -0,0 +1 @@
+linux
diff -Naur debootstrap/debootstrap deb/debootstrap
--- debootstrap/debootstrap	2011-08-15 19:35:15.000000000 -0400
+++ deb/debootstrap	2011-09-13 23:04:10.751954500 -0400
@@ -404,6 +404,9 @@
 # basic host OS guessing for non-Debian systems
 if [ -z "$HOST_OS" ]; then
 	case `uname` in
+		CYGWIN*)
+			HOST_OS=linux
+		;;
 		Linux)
 			HOST_OS=linux
 		;;
diff -Naur debootstrap/functions deb/functions
--- debootstrap/functions	2011-08-21 18:34:16.000000000 -0400
+++ deb/functions	2011-09-13 23:16:36.240522400 -0400
@@ -1232,6 +1232,8 @@
 	case "$HOST_OS" in
 	    *freebsd*|hurd*)
 		;;
+	    linux*)
+		;;
 	    *)
 		mknod "$1/test-dev-null" c 1 3 || return 1
 		if ! echo test > "$1/test-dev-null"; then