diff -u rrdtool-1.3.1/debian/changelog rrdtool-1.3.1/debian/changelog
--- rrdtool-1.3.1/debian/changelog
+++ rrdtool-1.3.1/debian/changelog
@@ -1,3 +1,11 @@
+rrdtool (1.3.1-4ubuntu2.1) karmic-proposed; urgency=low
+
+  * debian/rules:
+    - Use 'pyversions -vr' instead of 'pysupport-parseversions'.
+      (Close LP: #507452)
+
+ -- Michele Mordenti <michele.mordenti@gmail.com>  Thu, 14 Jan 2010 13:37:43 +0100
+
 rrdtool (1.3.1-4ubuntu2) karmic; urgency=low
 
   * Backport http://oss.oetiker.ch/rrdtool-trac/changeset/1459
diff -u rrdtool-1.3.1/debian/rules rrdtool-1.3.1/debian/rules
--- rrdtool-1.3.1/debian/rules
+++ rrdtool-1.3.1/debian/rules
@@ -13,11 +13,7 @@
 RUBY_VERS := 1.8 1.9
 RUBY_DEFAULT_VERS := 1.8
 
-#Python versions to build for. The work-around-doko way.
-PY_VERS := $(shell set -e; \
-                   for py in `pysupport-parseversions debian/pyversions`; do \
-                       if [ -x /usr/bin/python$$py ]; then echo $$py; fi;    \
-                   done)
+PY_VERS := $(shell pyversions -vr)
 
 #tcl version we're building for
 TCL_VERS := $(shell dpkg -s tcl-dev | grep '^Depends' \
@@ -184,7 +180,7 @@
 	dh_gencontrol -i
 	dh_md5sums -i
 	dh_builddeb -i
-	
+
 
 binary-arch: build-arch install-arch
 	dh_testdir