--- guile-1.9.15/module/system/base/compile.scm~	2011-01-26 23:03:16.000000000 +0100
+++ guile-1.9.15/module/system/base/compile.scm	2011-02-03 23:29:08.090142894 +0100
@@ -104,6 +104,7 @@
                  %compile-fallback-path
                  ;; no need for '/' separator here, canonicalize-path
                  ;; will give us an absolute path
+		 "/" ;; which does not start with / on MINGW
                  (canonicalize-path file)
                  (compiled-extension))))
          (and (false-if-exception (ensure-writable-dir (dirname f)))