And let rox use gtk2, please reference this:
--- /usr/pkgsrc/sysutils/rox/Makefile   Sat May 11 19:56:07 2002
+++ Makefile    Sun May 26 20:49:50 2002
@@ -2,6 +2,7 @@
 #
 
 DISTNAME=      rox-1.2.0
+PKGREVISION=   1
 CATEGORIES=    sysutils
 MASTER_SITES=  ${MASTER_SITE_SOURCEFORGE:=rox/}
 EXTRACT_SUFX=  .tgz
@@ -14,12 +15,14 @@
 
 DIST_SUBDIR=   rox
 
+USE_BUILDLINK_ONLY=    yes
 GNU_CONFIGURE= yes
+CONFIGURE_ARGS+=       --with-gtk2
 
 WRKSRC=                ${WRKDIR}/${DISTNAME}/ROX-Filer/src
 
 post-patch:
-       ${SED} -e "s:APPDIR:"${PREFIX}/apps":g" < ${FILESDIR}/rox > \
+       ${SED} -e "s:APPDIR:"${PREFIX}/share/rox":g" < ${FILESDIR}/rox > \
                ${WRKDIR}/${DISTNAME}/rox
 
 post-build:
@@ -30,12 +33,12 @@
        ${RM} -rf ${WRKSRC}
 
 do-install:
-       ${INSTALL_DATA_DIR} ${PREFIX}/apps
-       ${CP} -Rf ${WRKDIR}/${DISTNAME}/ROX-Filer ${PREFIX}/apps
+       ${INSTALL_DATA_DIR} ${PREFIX}/share/rox
+       ${CP} -Rf ${WRKDIR}/${DISTNAME}/ROX-Filer ${PREFIX}/share/rox
        ${INSTALL_SCRIPT} ${WRKDIR}/${DISTNAME}/rox ${PREFIX}/bin
        ${INSTALL_MAN} ${WRKDIR}/${DISTNAME}/rox.1 ${PREFIX}/man/man1
 
-.include "../../graphics/gdk-pixbuf/buildlink.mk"
-.include "../../textproc/libxml/buildlink.mk"
-.include "../../x11/gtk/buildlink.mk"
+.include "../../textproc/libxml2/buildlink.mk"
+.include "../../x11/gtk2/buildlink.mk"
+.include "../../mk/x11.buildlink.mk"
 .include "../../mk/bsd.pkg.mk"

All other rox-* pkgs already depend on gtk2 and use new dir ${PREFIX}/share/rox.