diff -u fzf.orig/Makefile fzf/Makefile
--- fzf.orig/Makefile	2016-08-12 18:41:49.000000000 +0200
+++ fzf/Makefile	2016-08-15 12:51:00.116938659 +0200
@@ -2,7 +2,7 @@
 # $FreeBSD: head/textproc/fzf/Makefile 420136 2016-08-12 16:41:49Z pawel $
 
 PORTNAME=	fzf
-PORTVERSION=	0.13.3
+PORTVERSION=	0.13.4
 CATEGORIES=	textproc
 
 MAINTAINER=	sascha@root-login.org
@@ -23,13 +23,21 @@
 
 GO_TARGET=	${GO_PKGNAME}/src/fzf
 
-PLIST_FILES=	bin/fzf bin/fzf-tmux \
-		man/man1/fzf.1.gz \
-		man/man1/fzf-tmux.1.gz
+PLIST_FILES=	bin/fzf man/man1/fzf.1.gz
+
+OPTIONS_DEFINE=	TMUX
+TMUX_DESC=	Install fzf-tmux (depends on BASH)
+
+OPTIONS_DEFAULT=	TMUX
+
+TMUX_RUN_DEPENDS=	bash:shells/bash
+TMUX_PLIST_FILES=	bin/fzf-tmux man/man1/fzf-tmux.1.gz
 
 post-install:
-	${INSTALL_SCRIPT} ${WRKSRC}/bin/${PORTNAME}-tmux ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_MAN} ${WRKSRC}/man/man1/fzf.1 ${STAGEDIR}${MANPREFIX}/man/man1
+
+post-install-TMUX-on:
+	${INSTALL_SCRIPT} ${WRKSRC}/bin/${PORTNAME}-tmux ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_MAN} ${WRKSRC}/man/man1/fzf-tmux.1 ${STAGEDIR}${MANPREFIX}/man/man1
 
 .include <bsd.port.pre.mk>
diff -u fzf.orig/distinfo fzf/distinfo
--- fzf.orig/distinfo	2016-08-12 18:41:49.000000000 +0200
+++ fzf/distinfo	2016-08-15 12:51:00.116938659 +0200
@@ -1,3 +1,3 @@
-TIMESTAMP = 1470655672
-SHA256 (junegunn-fzf-0.13.3_GH0.tar.gz) = 04bb6901959fb9d4a3193662ef27b6a9bac106630b9a4d2921d6af3512de8d2f
-SIZE (junegunn-fzf-0.13.3_GH0.tar.gz) = 105465
+TIMESTAMP = 1471256085
+SHA256 (junegunn-fzf-0.13.4_GH0.tar.gz) = ba561de9393c7f5604f3463c0d48960b86690afe8396f2c9672d3c4777960c7c
+SIZE (junegunn-fzf-0.13.4_GH0.tar.gz) = 107907
Common subdirectories: fzf.orig/files and fzf/files