in the map file the fragment needs to be called fragment indeed ...
diff --git a/releng/map/otdt.map.in b/releng/map/otdt.map.in
index 5ebeb5e..d1727d0 100644
--- a/releng/map/otdt.map.in
+++ b/releng/map/otdt.map.in
@@ -21,7 +21,7 @@
 plugin@org.eclipse.objectteams.runtime=GIT,repo=git://git.eclipse.org/gitroot/objectteams/org.eclipse.objectteams.git,path=plugins/org.eclipse.objectteams.runtime

 !the following is also referenced in otdt.doc/buildDoc.xml (plugin-name without version):

 plugin@org.eclipse.objectteams.otequinox=GIT,repo=git://git.eclipse.org/gitroot/objectteams/org.eclipse.objectteams.git,path=plugins/org.eclipse.objectteams.otequinox

-plugin@org.eclipse.objectteams.otequinox.bug253244workaround,1.0.0=GIT,repo=git://git.eclipse.org/gitroot/objectteams/org.eclipse.objectteams.git,path=plugins/org.eclipse.objectteams.otequinox.bug253244workaround

+fragment@org.eclipse.objectteams.otequinox.bug253244workaround,1.0.0=GIT,repo=git://git.eclipse.org/gitroot/objectteams/org.eclipse.objectteams.git,path=plugins/org.eclipse.objectteams.otequinox.bug253244workaround

 plugin@org.eclipse.objectteams.eclipse.monitor,2.0.0=GIT,repo=git://git.eclipse.org/gitroot/objectteams/org.eclipse.objectteams.git,path=plugins/org.eclipse.objectteams.eclipse.monitor,tag=builds/201305210612

 

 !not currently maintained: