--- databases/Makefile	(revision 517346)
+++ databases/Makefile	(working copy)
@@ -200,6 +200,7 @@ 
     SUBDIR += mongodb36-tools
     SUBDIR += mongodb40
     SUBDIR += mongodb40-tools
+    SUBDIR += mongodb42
     SUBDIR += mroonga
     SUBDIR += mtools-mongodb
     SUBDIR += mtop
--- databases/mongodb34/Makefile	(revision 517346)
+++ databases/mongodb34/Makefile	(working copy)
@@ -32,7 +32,7 @@ 
 USES=		compiler:c++14-lang cpe dos2unix python:build scons
 
 CONFLICTS_BUILD=	mongo-cxx-driver
-CONFLICTS_INSTALL=	mongodb36 mongodb40
+CONFLICTS_INSTALL=	mongodb36 mongodb4[02]
 
 DOS2UNIX_FILES=	src/third_party/IntelRDFPMathLib20U1/LIBRARY/src/bid_functions.h
 
--- databases/mongodb36/Makefile	(revision 517346)
+++ databases/mongodb36/Makefile	(working copy)
@@ -31,7 +31,7 @@ 
 USE_RC_SUBR=	mongod
 
 CONFLICTS_BUILD=	mongo-cxx-driver
-CONFLICTS_INSTALL=	mongodb34 mongodb40
+CONFLICTS_INSTALL=	mongodb34 mongodb4[02]
 
 SHEBANG_FILES=	src/mongo/installer/compass/install_compass.in
 python_OLD_CMD=	@python_interpreter@
--- databases/mongodb40/Makefile	(revision 517346)
+++ databases/mongodb40/Makefile	(working copy)
@@ -33,7 +33,7 @@ 
 USE_RC_SUBR=	mongod
 
 CONFLICTS_BUILD=	mongo-cxx-driver
-CONFLICTS_INSTALL=	mongodb3[46]
+CONFLICTS_INSTALL=	mongodb3[46] mongodb42
 
 SHEBANG_FILES=	src/mongo/installer/compass/install_compass.in
 python_OLD_CMD=	@python_interpreter@