--- Makefile	(Revision 552548)
+++ Makefile	(Arbeitskopie)
@@ -151,6 +151,11 @@ 
 IGNORE=		only supports LDAPS with SSL
 .endif
 
+.if ${PORT_OPTIONS:MGSSAPI_BASE} && exists(${LOCALBASE}/lib/libkrb5support.so)
+BROKEN=		The GSSAPI_BASE option is selected, but you have krb5 installed. \
+		Select GSSAPI_MIT, temporarily deinstall krb5 to build curl, or build in poudriere
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} -e '/^SUBDIRS = / s|$$| docs scripts|; /^DIST_SUBDIRS = / s| docs scripts||; /cd docs &&/d' ${WRKSRC}/Makefile.in
 	@${REINPLACE_CMD} -e 's|\(flags_dbg_off=\)".*"|\1""|; s|\(flags_opt_off=\)".*"|\1""|' ${WRKSRC}/configure