diff --git a/configs/eagle100/README.txt b/configs/eagle100/README.txt
index a4994f29ca4..5875c208e64 100644
--- a/configs/eagle100/README.txt
+++ b/configs/eagle100/README.txt
@@ -63,6 +63,15 @@ GNU Toolchain Options
      because the dependencies are generated using Windows pathes which do not
      work with the Cygwin make.
 
+     Support has been added for making dependencies with the CodeSourcery toolchain.
+     That support can be enabled by modifying your Make.defs file as follows:
+
+    -  MKDEP                = $(TOPDIR)/tools/mknulldeps.sh
+    +  MKDEP                = $(TOPDIR)/tools/mkdeps.sh --winpaths "$(TOPDIR)"
+
+     If you have problems with the dependency build (for example, if you are not
+     building on C:), then you may need to modify tools/mkdeps.sh
+
   NOTE: The CodeSourcery toolchain (2009q1) does not work with default optimization
   level of -Os (See Make.defs).  It will work with -O0, -O1, or -O2, but not with
   -Os.