diff --git a/Projects/WorkDir/CMakeLists.txt b/Projects/WorkDir/CMakeLists.txt
index d68727000089433dd3b178da1b9c0e7bed2cc6bf..8bcccf4ec5aaa2e99f2e326edfaa72ed989c2c4a 100644
--- a/Projects/WorkDir/CMakeLists.txt
+++ b/Projects/WorkDir/CMakeLists.txt
@@ -15,7 +15,7 @@ find_package( AtlasCMake QUIET )
 # of possible project names. Basically the names of all the other
 # sub-directories inside the Projects/ directory in the repository.
 set( _parentProjectNames Athena AthenaP1 AnalysisBase AthAnalysisBase
-   AthSimulation )
+   AthSimulation AthDerivation )
 set( _defaultParentProject Athena )
 set( _defaultUseFortran TRUE )
 foreach( _pp ${_parentProjectNames} )