diff -Naur ghostscript9-agpl-base.orig/Makefile ghostscript9-agpl-base/Makefile
--- ghostscript9-agpl-base.orig/Makefile	2019-06-01 02:39:22.000000000 -0400
+++ ghostscript9-agpl-base/Makefile	2019-09-26 10:40:52.880791000 -0400
@@ -1,10 +1,9 @@
 # $FreeBSD: head/print/ghostscript9-agpl-base/Makefile 503222 2019-06-01 06:39:22Z tcberner $
 
 PORTNAME=	ghostscript
-PORTVERSION=	9.27
-PORTREVISION=	2
+DISTVERSION=	9.28${RCSTRING}
 CATEGORIES=	print
-MASTER_SITES=	https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/download/gs${PORTVERSION:S/.//}/
+MASTER_SITES=	https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/download/gs${DISTVERSION:S/.//g}/
 PKGNAMESUFFIX=	9-agpl-base
 
 MAINTAINER=	doceng@FreeBSD.org
@@ -22,18 +21,20 @@
 		libtiff.so:graphics/tiff
 RUN_DEPENDS=	poppler-data>=0.4.9:graphics/poppler-data
 
+USES=		cpe gmake iconv jpeg localbase pkgconfig tar:xz
+USE_CSTD=	gnu99
+USE_LDCONFIG=	yes
+
 CONFLICTS_INSTALL= \
 		ghostscript[789]-[0-9]* \
 		ghostscript[789]-nox11-[0-9]* \
 		ghostscript9-agpl-[0-9]* \
 		ghostscript9-agpl-nox11-[0-9]*
 
-USES=		cpe gmake iconv jpeg localbase pkgconfig tar:xz
-USE_CSTD=	gnu99
-USE_LDCONFIG=	yes
+RCSTRING=	rc3
 CPE_VENDOR=	artifex
-DATADIR=	${PREFIX}/share/${PORTNAME}/${PORTVERSION}
-DOCSDIR=	${PREFIX}/share/doc/${PORTNAME}/${PORTVERSION}
+DATADIR=	${PREFIX}/share/${PORTNAME}/${DISTVERSION:S/${RCSTRING}//}
+DOCSDIR=	${PREFIX}/share/doc/${PORTNAME}/${DISTVERSION:S/${RCSTRING}//}
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--disable-compile-inits \
 		--disable-dbus \
@@ -52,7 +53,9 @@
 		--without-x
 ALL_TARGET=	so
 INSTALL_TARGET=	soinstall
-PLIST_SUB=	GS_VERSION="${PORTVERSION}"
+PLIST_SUB=	GS_VERSION="${DISTVERSION:S/${RCSTRING}//}"
+
+WRKSRC=		${WRKDIR}/${PORTNAME}-${DISTVERSION}
 
 OPTIONS_DEFINE=	DOCS CUPS IJS JPEG2000
 OPTIONS_DEFAULT=CUPS
diff -Naur ghostscript9-agpl-base.orig/distinfo ghostscript9-agpl-base/distinfo
--- ghostscript9-agpl-base.orig/distinfo	2019-04-21 12:41:37.000000000 -0400
+++ ghostscript9-agpl-base/distinfo	2019-09-26 09:49:00.565196000 -0400
@@ -1,3 +1,3 @@
-TIMESTAMP = 1555687281
-SHA256 (ghostscript-9.27.tar.xz) = fc0f1fbacd3610c67a9f080487a0e021f14390c38a4b4df9723e2bdf2b90b619
-SIZE (ghostscript-9.27.tar.xz) = 33182608
+TIMESTAMP = 1569503650
+SHA256 (ghostscript-9.28rc3.tar.xz) = 7e0aa2100d37fd3fe56f849ca4924e0c89e56a240916ce8fe62dd6928e852892
+SIZE (ghostscript-9.28rc3.tar.xz) = 34611464