Index: shells/fish/Makefile
===================================================================
--- shells/fish/Makefile
+++ shells/fish/Makefile
@@ -13,8 +13,8 @@
 
 LIB_DEPENDS+=	libpcre2-32.so:devel/pcre2
 
-USES=		autoreconf cpe gmake libtool ncurses pkgconfig pathfix python:3.4+ \
-		localbase compiler:c++11-lang shebangfix
+USES=		autoreconf cpe gmake libtool ncurses pkgconfig pathfix \
+		python:3.4+ localbase compiler:c++11-lang shebangfix
 SHEBANG_FILES=	share/tools/*.py share/tools/web_config/webconfig.py
 
 CONFLICTS_INSTALL=	comms/mlan3
@@ -33,6 +33,8 @@
 NLS_CONFIGURE_ENV=	ac_cv_func_gettext=yes
 NLS_CONFIGURE_OFF=	--without-gettext
 
+.include <bsd.port.options.mk>
+
 post-patch:
 	@${REINPLACE_CMD} -e \
 		'/^all:/s|user_doc|| ; \
@@ -45,6 +47,10 @@
 		 /pthread_create/d ; \
 		 s|ncurses curses|curses| ; \
 		 s|ncurses.h||' ${WRKSRC}/configure.ac
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1200056
+	@${REINPLACE_CMD} -e \
+		's|#ifdef __cpp_lib_make_unique|#if 1|' ${WRKSRC}/src/common.h
+.endif
 
 post-install:
 .for i in fish fish_indent fish_key_reader