While they are still broken, shouldn't the same changes be made to $subject binary package:
diff -Nru fusionforge-6.0.4+20160504/debian/control fusionforge-6.0.4+20160504/debian/control --- fusionforge-6.0.4+20160504/debian/control 2017-01-01 07:59:40.000000000 -0800 +++ fusionforge-6.0.4+20160504/debian/control 2017-05-30 15:28:05.000000000 -0700 @@ -449,7 +449,7 @@ with content-negotiation (application/rdf+xml). Package: fusionforge-plugin-extsubproj -Depends: fusionforge-web (=${source:Version}), libarc-php, fusionforge-plugin-compactpreview, ${misc:Depends} +Depends: fusionforge-web (=${source:Version}), fusionforge-plugin-compactpreview, ${misc:Depends} Architecture: all Description: FusionForge plugin - External SubProjects FusionForge provides many tools to aid collaboration in a diff -Nru fusionforge-6.0.4+20160504/debian/plugins fusionforge-6.0.4+20160504/debian/plugins --- fusionforge-6.0.4+20160504/debian/plugins 2017-01-01 07:59:40.000000000 -0800 +++ fusionforge-6.0.4+20160504/debian/plugins 2017-05-30 15:27:59.000000000 -0700 @@ -46,7 +46,7 @@ Depends: Package: fusionforge-plugin-extsubproj -Depends: libarc-php, fusionforge-plugin-compactpreview +Depends: fusionforge-plugin-compactpreview Package: fusionforge-plugin-foafprofiles Depends: -- Nishanth Aravamudan Ubuntu Server Canonical Ltd