diff --git a/lang/yap/Makefile b/lang/yap/Makefile
index 0080e8b6b313..ae35fc256d16 100644
--- a/lang/yap/Makefile
+++ b/lang/yap/Makefile
@@ -1,71 +1,74 @@
 PORTNAME=	yap
 PORTVERSION=	6.2.2
 PORTREVISION=	11
 CATEGORIES=	lang
 MASTER_SITES=	https://mirrors.dotsrc.org/mirrors/exherbo/	\
 		http://ftp.lyx.org/pub/minix/distfiles/backup/	\
 		http://tenampak.izt.uam.mx/programas/
 
 MAINTAINER=	eugen@FreeBSD.org
 COMMENT=	High-performance Prolog compiler
 WWW=		http://www.dcc.fc.up.pt/~vsc/Yap/
 
 LICENSE=		ART20 LGPL20
 LICENSE_COMB=		dual
 LICENSE_FILE_ART20=	${WRKSRC}/Artistic
 LICENSE_FILE_LGPL20=	${WRKSRC}/COPYING
 
 #BROKEN_riscv64=		fails to build: procedure chr_translate/2 is undefined, called from context  prolog:once/1
 
 LIB_DEPENDS=	libgmp.so:math/gmp
 
 USES=		compiler:features gmake localbase readline
+
+GNU_CONFIGURE=	yes
+CONFIGURE_ARGS=	--enable-max-performance \
+		--disable-myddas
+
+DATADIR=	${PREFIX}/share/Yap
+DOCSDIR=	${PREFIX}/share/doc/Yap
 PORTSCOUT=	limit:^6\.2\.
 
 OPTIONS_DEFINE=		DOCS BUILDDOCS
+
 BUILDDOCS_DESC=	Rebuild documentation (requires TeX)
 DOCS_DESC=	Install documentation
 
-BUILDDOCS_USES=		tex
-BUILDDOCS_USE=		TEX=formats:build,dvipsk:build
+BUILDDOCS_BROKEN=	Fatal error occurred, no output PDF file produced
 BUILDDOCS_BUILD_DEPENDS=${LOCALBASE}/bin/texi2html:textproc/texi2html \
 			${LOCALBASE}/bin/texi2pdf:print/texinfo
+BUILDDOCS_USES=		tex
+BUILDDOCS_USE=		TEX=formats:build,dvipsk:build
 
 DOCS_INSTALL_TARGET=	install install_docs
 
-GNU_CONFIGURE=	yes
-CONFIGURE_ARGS=	--enable-max-performance \
-		--disable-myddas
-
-DOCSDIR=	${PREFIX}/share/doc/Yap
-DATADIR=	${PREFIX}/share/Yap
 DOCS_PACKAGE=	yap-doc-${PORTVERSION}
 
 post-build-DOCS-off:
 	# prevent the instalation of three docs files
 	${REINPLACE_CMD} -e '559,562d' ${WRKSRC}/Makefile
 
 .include <bsd.port.pre.mk>
 
 .if ${OPSYS} == FreeBSD && ${COMPILER_TYPE} == clang && ${COMPILER_VERSION} >= 160
 CFLAGS+=	-Wno-incompatible-function-pointer-types
 CONFIGURE_ENV+=	CFLAGS="${CFLAGS}"
 .endif
 
 .if ${OPSYS} == FreeBSD && ${COMPILER_TYPE} == clang && ${COMPILER_VERSION} >= 180
 pre-configure:
 	${REINPLACE_CMD} 's/ -export-dynamic/ -Wl,--export-dynamic/' \
 		${WRKSRC}/configure ${WRKSRC}/packages/cplint/slipcase/Makefile.in
 .endif
 
 .if ${ARCH:Mpowerpc*}
 USES+=		compiler:gcc-c++11-lib
 .endif
 
 .if ${PORT_OPTIONS:MDOCS} && !${PORT_OPTIONS:MBUILDDOCS}
 MASTER_SITES+=	http://www.grosbein.net/freebsd/distfiles/:docs \
 		LOCAL/eugen:docs
 DISTFILES=	${DISTNAME}${EXTRACT_SUFX} ${DOCS_PACKAGE}${EXTRACT_SUFX}:docs
 .endif
 
 .include <bsd.port.post.mk>