diff --git a/debian/changelog b/debian/changelog
index 4db6be9a..59e4e416 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+livecd-rootfs (2.449) UNRELEASED; urgency=medium
+
+  * Use VMDKstream in a more future-proof way
+
+ -- Balint Reczey <rbalint@ubuntu.com>  Mon, 24 Jul 2017 20:39:35 +0200
+
 livecd-rootfs (2.448) artful; urgency=medium
 
   [ Balint Reczey ]
diff --git a/live-build/functions b/live-build/functions
index 028352ac..fee44f67 100644
--- a/live-build/functions
+++ b/live-build/functions
@@ -226,12 +226,12 @@ create_vmdk() {
     destination="$2"
     size="${3:-10240}"
 
-    streamconverter="/usr/lib/python2.7/dist-packages/VMDKstream.py"
+    streamconverter="VMDKstream"
     scratch_d=$(mktemp -d)
     cp ${src} ${scratch_d}/resize.img
 
     truncate --size=${size}M ${scratch_d}/resize.img
-    python ${streamconverter} ${scratch_d}/resize.img ${destination}
+    python -m ${streamconverter} ${scratch_d}/resize.img ${destination}
     modify_vmdk_header ${destination}
 
     qemu-img info ${destination}