diff --git a/math/calc/Makefile b/math/calc/Makefile
index 2f93ed72947c..66f1c37cda6e 100644
--- a/math/calc/Makefile
+++ b/math/calc/Makefile
@@ -1,39 +1,43 @@
 # Created by: jmz
 
 PORTNAME=	calc
-PORTVERSION=	2.14.0.10
+PORTVERSION=	2.14.0.12
 DISTVERSIONPREFIX=	v
 CATEGORIES=	math
 
 MAINTAINER=	adamw@FreeBSD.org
 COMMENT=	Interactive CLI arbitrary-precision calculator
 
 LICENSE=	LGPL21
 LICENSE_FILE=	${WRKSRC}/COPYING-LGPL
 
 USES=		gmake tar:bzip2 readline
 USE_GITHUB=	yes
 GH_ACCOUNT=	lcn2
 
 MAKE_JOBS_UNSAFE=	yes
 PLIST_SUB+=	VERSION=${PORTVERSION}
 
 MAKEFILE=	Makefile.ship
 MAKE_ARGS=	DATADIR="${DATADIR}"
 TEST_TARGET=	check
 
 OPTIONS_DEFINE=	FULL HELP
 OPTIONS_DEFAULT=FULL HELP
 OPTIONS_SUB=	yes
 FULL_DESC=	Install all funcs/scripts/headers (OFF: just basic calculator)
 HELP_DESC=	Install calc help files
 
 # We use Makefile.freebsd because Makefile.local is in .gitignore
 post-extract:
-	${SED} -e 's|%%CC%%|${CC}|; s|%%CFLAGS%%|${CFLAGS}|' \
+	${SED} -e 's|%%CC%%|${CC}|; s|%%CFLAGS%%|${CFLAGS}|; s|%%GMAKE%%|${MAKE_CMD}|' \
 		${FILESDIR}/Makefile.freebsd > ${WRKSRC}/Makefile.local
+# The upstream Makefiles are a mess. Bash is hardcoded in many files, and only
+# some of the Makefiles allow overrides. Plus, they error out if sed .bkp files exist.
+	${FIND} ${WRKSRC} -name 'Makefile*' \
+		| ${XARGS} ${REINPLACE_CMD} -i '' -e 's|/bin/bash|${SH}|'
 
 post-install:
 	cd ${STAGEDIR}${PREFIX} && ${STRIP_CMD} bin/calc lib/lib*.so
 
 .include <bsd.port.mk>
diff --git a/math/calc/distinfo b/math/calc/distinfo
index f2d7acb2a487..3e078bbbcc53 100644
--- a/math/calc/distinfo
+++ b/math/calc/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1638634588
-SHA256 (lcn2-calc-v2.14.0.10_GH0.tar.gz) = 6fc6d4e5815a15b12fcb935983563be6dd1571d3d5f2db8d5c77f85ad911c324
-SIZE (lcn2-calc-v2.14.0.10_GH0.tar.gz) = 1162568
+TIMESTAMP = 1639302685
+SHA256 (lcn2-calc-v2.14.0.12_GH0.tar.gz) = 06b1605140d00884b88a62b4dabc880c8ddccb9d430f5910e9c081e9996395f8
+SIZE (lcn2-calc-v2.14.0.12_GH0.tar.gz) = 1204146
diff --git a/math/calc/files/Makefile.freebsd b/math/calc/files/Makefile.freebsd
index 4e2b53f88dc1..500a28eb25e8 100644
--- a/math/calc/files/Makefile.freebsd
+++ b/math/calc/files/Makefile.freebsd
@@ -1,19 +1,20 @@
 # vim:ft=make
 ARCH_CFLAGS:=
 BINDIR:=	${PREFIX}/bin
 CALC_INCDIR:=	${PREFIX}/include/calc
 CALC_SHAREDIR:=	${DATADIR}
 CALCPAGER:=	more
 CC:=		%%CC%%
 CFLAGS:=	%%CFLAGS%% ${ICFLAGS} ${CCOPT}
 INCDIR:=	${LOCALBASE}/include
 LCC:=		%%CC%%
 LIBDIR:=	${PREFIX}/lib
+MAKE:= 	 	%%GMAKE%%
 MANDIR:=	${PREFIX}/man/man1
 SCRIPTDIR:=	${PREFIX}/libexec/cscript
 T:=		${DESTDIR}
 USE_READLINE:=	-DUSE_READLINE -I${LOCALBASE}/include
 
 # These need to be in this order:
 READLINE_LIBS:=		-L${LOCALBASE}/lib -lreadline
 READLINE_EXTRAS:=	${READLINE_LIBS} -lhistory -lncurses