diff --git a/lang/eisl/Makefile b/lang/eisl/Makefile
index f0b576eb058b..e719a321f995 100644
--- a/lang/eisl/Makefile
+++ b/lang/eisl/Makefile
@@ -1,35 +1,35 @@
 PORTNAME=	eisl
 DISTVERSIONPREFIX=	v
-DISTVERSION=	2.63
+DISTVERSION=	2.85
 CATEGORIES=	lang devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Interpreter and compiler compatible with ISLisp standard
 WWW=		https://github.com/sasagawa888/eisl
 
 LICENSE=	BSD2CLAUSE
-LICENSE_FILE=	${WRKSRC}/documents/license.txt
+LICENSE_FILE=	${WRKSRC}/license.txt
 
 BROKEN_i386=	stage breaks: data segment of more than 500GB is required, see https://github.com/sasagawa888/eisl/issues/218
 
 TEST_DEPENDS=	cppcheck:devel/cppcheck
 
 USES=		gmake ncurses:port # port because tests need ncurses6-config
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	sasagawa888
 
 ALL_TARGET=	${PORTNAME}
 TEST_TARGET=	check # tests print some errors and warnings, see https://github.com/sasagawa888/eisl/issues/181#issuecomment-1195147029
 
 MAKEFILE=	makefile
 
 LDFLAGS+=	-lncursesw
 
 .include <bsd.port.options.mk>
 
 .if ${ARCH} == powerpc64 || ${ARCH} == riscv64
 EXTRA_PATCHES=	${FILESDIR}/extra-patch-makefile
 .endif
 
 .include <bsd.port.mk>
diff --git a/lang/eisl/distinfo b/lang/eisl/distinfo
index dca96103dbc5..5302e8ad84d1 100644
--- a/lang/eisl/distinfo
+++ b/lang/eisl/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1663387122
-SHA256 (sasagawa888-eisl-v2.63_GH0.tar.gz) = 92081017e9d3d895ba193c274d5b49bbc9ae0a24fc41e73ef0b9229b4a217faf
-SIZE (sasagawa888-eisl-v2.63_GH0.tar.gz) = 2004974
+TIMESTAMP = 1678078933
+SHA256 (sasagawa888-eisl-v2.85_GH0.tar.gz) = e93d21f7d08978dafaa62b3bb99314a75f86606cf4c5bd07a0879ef65030e7f7
+SIZE (sasagawa888-eisl-v2.85_GH0.tar.gz) = 2126779
diff --git a/lang/eisl/files/patch-makefile b/lang/eisl/files/patch-makefile
index 1227ce3f74c3..3f3cd1650e48 100644
--- a/lang/eisl/files/patch-makefile
+++ b/lang/eisl/files/patch-makefile
@@ -1,29 +1,29 @@
---- makefile.orig	2022-09-15 10:55:05 UTC
+--- makefile.orig	2023-03-05 08:53:07 UTC
 +++ makefile
 @@ -1,7 +1,7 @@
  .POSIX:
  .DELETE_ON_ERROR:
  
 -CC := cc
 +#CC := cc
  DC := ldc2
  LD := $(CC)
  ifneq  ($(shell uname),Darwin)
-@@ -31,7 +31,7 @@ else
- 		endif
- 	endif
- endif
--CFLAGS := $(INCS) -Wall -Wextra -D_FORTIFY_SOURCE=2 $(CURSES_CFLAGS) -U_XOPEN_SOURCE -D_XOPEN_SOURCE=700 -D_XOPEN_SOURCE_EXTENDED -Inana/src
-+CFLAGS += $(INCS) -Wall -Wextra -D_FORTIFY_SOURCE=2 $(CURSES_CFLAGS) -U_XOPEN_SOURCE -D_XOPEN_SOURCE=700 -D_XOPEN_SOURCE_EXTENDED -Inana/src
- DFLAGS := --preview=all --de -w --O3 --release --betterC
- SRC_CII := cii/src/except.c cii/src/fmt.c cii/src/str.c cii/src/text.c
- SRC_D := dextension.d disl.d
-@@ -54,7 +54,7 @@ ifeq ($(DEBUG),1)
- 	SRC_NANA := nana/src/I.c
- 	ifneq  ($(shell uname),OpenBSD)
- 		CFLAGS += -fsanitize=undefined
--		LDFLAGS := -fsanitize=undefined
-+		LDFLAGS += -fsanitize=undefined
+@@ -67,7 +67,7 @@ ifeq ($(DEBUG),1)
+ 		LDFLAGS += -fsanitize=undefined
  	endif
  else
- 	CFLAGS += -O3 -flto -DNDEBUG=1 -DWITHOUT_NANA=1
+-	CFLAGS += -O3 -flto -DNDEBUG=1 -DWITHOUT_NANA=1
++	CFLAGS += -O3 -DNDEBUG=1 -DWITHOUT_NANA=1
+ 	SRC_CII += cii/src/mem.c
+ endif
+ OBJ_CII := $(SRC_CII:.c=.o)
+@@ -85,7 +85,7 @@ ifeq  ($(shell uname -n),raspberrypi)
+ 	CFLAGS += -D__rpi__
+ endif
+ ifneq ($(DEBUG),1)
+-	LDFLAGS += -flto
++	#LDFLAGS += -flto
+ 	ifeq  ($(shell uname),Darwin)
+ 		LDFLAGS += -Wl,-S,-x
+ 	else
diff --git a/lang/eisl/pkg-plist b/lang/eisl/pkg-plist
index d448eb97045c..9ee6547262da 100644
--- a/lang/eisl/pkg-plist
+++ b/lang/eisl/pkg-plist
@@ -1,45 +1,50 @@
 bin/edlis
 bin/eisl
 %%DATADIR%%/fast.h
 %%DATADIR%%/ffi.h
 %%DATADIR%%/library/bit.lsp
 %%DATADIR%%/library/bit.o
 %%DATADIR%%/library/combination.lsp
 %%DATADIR%%/library/compiler.lsp
 %%DATADIR%%/library/complex.lsp
 %%DATADIR%%/library/cross.lsp
 %%DATADIR%%/library/csv.lsp
 %%DATADIR%%/library/cxr.lsp
+%%DATADIR%%/library/datetime.lsp
+%%DATADIR%%/library/datetime.o
 %%DATADIR%%/library/elixir.lsp
 %%DATADIR%%/library/escape.lsp
 %%DATADIR%%/library/escape.o
 %%DATADIR%%/library/formatter.lsp
 %%DATADIR%%/library/formula.lsp
 %%DATADIR%%/library/functions-data.lsp
 %%DATADIR%%/library/functions-dataj.lsp
 %%DATADIR%%/library/functions.lsp
 %%DATADIR%%/library/functionsj.lsp
 %%DATADIR%%/library/i18n.lsp
 %%DATADIR%%/library/i18n.o
 %%DATADIR%%/library/lazy.lsp
 %%DATADIR%%/library/list.lsp
 %%DATADIR%%/library/logger.lsp
 %%DATADIR%%/library/logger.o
 %%DATADIR%%/library/macro.lsp
 %%DATADIR%%/library/math.lsp
 %%DATADIR%%/library/mexp.lsp
 %%DATADIR%%/library/ndbm.lsp
 %%DATADIR%%/library/ndbm.o
-%%DATADIR%%/library/number.lsp
 %%DATADIR%%/library/opengl.lsp
 %%DATADIR%%/library/persist.lsp
+%%DATADIR%%/library/plot.lsp
+%%DATADIR%%/library/plot.o
+%%DATADIR%%/library/prolog.lsp
+%%DATADIR%%/library/prolog.o
 %%DATADIR%%/library/regex.lsp
 %%DATADIR%%/library/regex.o
 %%DATADIR%%/library/seq.lsp
 %%DATADIR%%/library/sort.lsp
 %%DATADIR%%/library/tcltk.lsp
 %%DATADIR%%/library/tcpip.lsp
 %%DATADIR%%/library/tcpip.o
 %%DATADIR%%/library/test.lsp
 %%DATADIR%%/library/virtty.lsp
 %%DATADIR%%/library/virtty.o