vagrant@ubuntu-disco:~/lucene-solr-3.6.2+dfsg$ sudo quilt diff debian/solr-tomcat.install
Index: lucene-solr-3.6.2+dfsg/debian/solr-tomcat.install
===================================================================
--- lucene-solr-3.6.2+dfsg.orig/debian/solr-tomcat.install
+++ lucene-solr-3.6.2+dfsg/debian/solr-tomcat.install
@@ -1,3 +1,3 @@
 debian/solr-tomcat.xml /etc/solr/
 debian/tomcat.policy /etc/solr/
-debian/solr-permissions.conf /etc/systemd/system/tomcat9.d/
+debian/solr-permissions.conf /etc/systemd/system/tomcat9.service.d/