--- a/Makefile	Wed Jan 13 22:01:41 2010 +0200
+++ b/Makefile	Wed Jan 13 22:06:21 2010 +0200
@@ -1,11 +1,11 @@
-
+SHELL = /bin/sh
 
 ifeq '' '$(HOME)'
-  $(error HOME env var and prefix var are not set!)
+  $(error HOME env var not set!)
 endif
 
 host_os = linux
-ifneq '' '$(WINDRIVE)'         # TODO
+ifneq '' '$(COMSPEC)'
   host_os = windows
 endif