diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ad3ef58ad..e8eb8c190 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -64,6 +64,7 @@ target_include_directories(dump_header
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/TLemRunHeader>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/MuSR_software/Class_MuSR_PSI/>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/mud/src>
+    $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/nexus>
 )
 target_link_libraries(dump_header ${ROOT_LIBRARIES} ${MUSRFIT_LIBS})
 
diff --git a/src/classes/CMakeLists.txt b/src/classes/CMakeLists.txt
index d7f04daab..0536dca77 100644
--- a/src/classes/CMakeLists.txt
+++ b/src/classes/CMakeLists.txt
@@ -65,12 +65,13 @@ add_library(PMusr SHARED
 #--- make sure that the include directory is found ----------------------------
 target_include_directories(
   PMusr BEFORE PRIVATE 
+    $<BUILD_INTERFACE:${NEXUS_INCLUDE_DIR}>
     $<BUILD_INTERFACE:${MUSRFIT_INC}>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/MusrRoot>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/TLemRunHeader>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/MuSR_software/Class_MuSR_PSI>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/mud/src>
-    $<BUILD_INTERFACE:${NEXUS_INCLUDE_DIR}>
+    $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/nexus>
 )
 
 add_library(PUserFcnBase SHARED