diff --git a/scripts/cleanup_datasets/delete_userless_histories_main.sh b/scripts/cleanup_datasets/delete_userless_histories_main.sh
index e0c486336a0..75a437d2b51 100644
--- a/scripts/cleanup_datasets/delete_userless_histories_main.sh
+++ b/scripts/cleanup_datasets/delete_userless_histories_main.sh
@@ -1,9 +1,4 @@
 #!/bin/sh
 
-# This script must be executed from the $UNIVERSE_HOME directory
-# e.g., sh ./scripts/cleanup_datasets/delete_userless_histories_main.sh
-
-. ./scripts/get_python.sh
-. ./setup_paths.sh
-
-$GALAXY_PYTHON ./scripts/cleanup_datasets/cleanup_datasets.py ./universe_wsgi.ini -d 60 -2 $@ >> ./scripts/cleanup_datasets/delete_userless_histories_main.log
+cd `dirname $0`/../..
+python ./scripts/cleanup_datasets/cleanup_datasets.py ./universe_wsgi.ini -d 60 -2 $@ >> ./scripts/cleanup_datasets/delete_userless_histories.log
diff --git a/scripts/cleanup_datasets/purge_datasets_main.sh b/scripts/cleanup_datasets/purge_datasets_main.sh
index 64737d2eb1f..a1791be9aed 100644
--- a/scripts/cleanup_datasets/purge_datasets_main.sh
+++ b/scripts/cleanup_datasets/purge_datasets_main.sh
@@ -1,9 +1,4 @@
 #!/bin/sh
 
-# This script must be executed from the $UNIVERSE_HOME directory
-# e.g., sh ./scripts/cleanup_datasets/purge_datasets_main.sh
-
-. ./scripts/get_python.sh
-. ./setup_paths.sh
-
-$GALAXY_PYTHON ./scripts/cleanup_datasets/cleanup_datasets.py ./universe_wsgi.ini -d 60 -6 -r $@ >> ./scripts/cleanup_datasets/purge_datasets_main.log
+cd `dirname $0`/../..
+python ./scripts/cleanup_datasets/cleanup_datasets.py ./universe_wsgi.ini -d 60 -6 -r $@ >> ./scripts/cleanup_datasets/purge_datasets.log
diff --git a/scripts/cleanup_datasets/purge_histories_main.sh b/scripts/cleanup_datasets/purge_histories_main.sh
index f693ad43196..538f9d0d5f0 100644
--- a/scripts/cleanup_datasets/purge_histories_main.sh
+++ b/scripts/cleanup_datasets/purge_histories_main.sh
@@ -1,9 +1,4 @@
 #!/bin/sh
 
-# This script must be executed from the $UNIVERSE_HOME directory
-# e.g., sh ./scripts/cleanup_datasets/purge_histories_main.sh
-
-. ./scripts/get_python.sh
-. ./setup_paths.sh
-
-$GALAXY_PYTHON ./scripts/cleanup_datasets/cleanup_datasets.py ./universe_wsgi.ini -d 60 -4 -r $@ >> ./scripts/cleanup_datasets/purge_histories_main.log
+cd `dirname $0`/../..
+python ./scripts/cleanup_datasets/cleanup_datasets.py ./universe_wsgi.ini -d 60 -4 -r $@ >> ./scripts/cleanup_datasets/purge_histories.log