1 files changed, 12 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 46ddc2f..493cdca 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,14 @@
-NANT = $(shell if test "$$EMACS" = "t" ; then echo "nant"; else echo "./nant-color"; fi)
+# hey, emacs! this is a -*- makefile -*-
+#
+# OpenSim makefile
+#
+
+RUBY    = $(strip $(shell which ruby 2>/dev/null))
+ifeq ($(RUBY),)
+NANT    = nant
+else
+NANT    = $(shell if test "$$EMACS" = "t" ; then echo "nant"; else echo "./nant-color"; fi)
+endif
 
 all: prebuild
         # @export PATH=/usr/local/bin:$(PATH)
@@ -14,7 +24,7 @@ prebuild:
 
 clean:
         # @export PATH=/usr/local/bin:$(PATH)
-        ${NANT} clean
+        -${NANT} clean
 
 test: prebuild
         ${NANT} test