diff --git a/graphics/hs-HOpenGL/Makefile b/graphics/hs-HOpenGL/Makefile
index fd23562ed6e4..88ce88a268c1 100644
--- a/graphics/hs-HOpenGL/Makefile
+++ b/graphics/hs-HOpenGL/Makefile
@@ -40,6 +40,7 @@ pre-configure:
 
 CONFIGURE_ARGS+=--with-library-dir=${LIB_DIR} --with-import-dir=${IMPORT_DIR} --enable-Mesa
 PLIST_SUB=	LIB_DIR=${LIB_DIR_REL} IMPORT_DIR=${IMPORT_DIR_REL}
+PLIST_SUB+=	GHC_VERSION="${GHC_VERSION}"
 
 ALL_TARGET=	depend all
 
@@ -93,4 +94,6 @@ post-install:
 	${INSTALL_DATA} ${GFXSRC}/UI/GLUT/*.hi ${GFXDIR}/UI/GLUT
 	${INSTALL_DATA} ${GFXSRC}/UI/GLUT/Callbacks/*.hi ${GFXDIR}/UI/GLUT/Callbacks
 
+	@${RM} -f ${PREFIX}/lib/ghc-${GHC_VERSION}/package.conf.old
+
 .include <bsd.port.mk>
diff --git a/graphics/hs-HOpenGL/pkg-plist b/graphics/hs-HOpenGL/pkg-plist
index 54354561a60d..12b1ae1935b9 100644
--- a/graphics/hs-HOpenGL/pkg-plist
+++ b/graphics/hs-HOpenGL/pkg-plist
@@ -374,4 +374,6 @@ share/examples/HOpenGL/redbook_HS/Wrap.hs
 share/examples/HOpenGL/00Contents
 @dirrm share/examples/HOpenGL
 @exec %D/bin/ghc-pkg -ai %D/share/HOpenGL/HOpenGL.conf
+@exec /bin/rm -f %D/lib/ghc-%%GHC_VERSION%%/package.conf.old
 @unexec %D/bin/ghc-pkg -r HOpenGL
+@unexec /bin/rm -f %D/lib/ghc-%%GHC_VERSION%%/package.conf.old