Index: head/biology/bedtools/Makefile
===================================================================
--- head/biology/bedtools/Makefile	(revision 494553)
+++ head/biology/bedtools/Makefile	(revision 494554)
@@ -1,31 +1,36 @@
 # $FreeBSD$
 
 PORTNAME=	bedtools
 DISTVERSIONPREFIX=	v
 DISTVERSION=	2.27.1
 PORTREVISION=	2
 CATEGORIES=	biology
 
 MAINTAINER=	jwb@FreeBSD.org
 COMMENT=	Toolset for genome set arithmetic such as intersect, union
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		compiler:c++11-lang gmake python
 USE_GITHUB=	yes
 GH_ACCOUNT=	arq5x
 GH_PROJECT=	bedtools2
 
+post-extract:
+# Avoid conflict with C++20 <version> by adding .txt suffix
+	@${MV} ${WRKSRC}/src/utils/gzstream/version \
+		${WRKSRC}/src/utils/gzstream/version.txt
+
 pre-build:
 	@${REINPLACE_CMD} -e 's|python|${PYTHON_CMD}|g' ${WRKSRC}/Makefile
 	@${REINPLACE_CMD} -e 's|@\$$(CXX)|$$(CXX)|g' \
 		${WRKSRC}/*/Makefile \
 		${WRKSRC}/*/*/Makefile \
 		${WRKSRC}/*/*/*/Makefile \
 		${WRKSRC}/*/*/*/*/Makefile
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/bin/bedtools
 
 .include <bsd.port.mk>