diff --git a/dev-lang/eisl/Manifest b/dev-lang/eisl/Manifest
new file mode 100644
index 0000000000000..475684b5a8409
--- /dev/null
+++ b/dev-lang/eisl/Manifest
@@ -0,0 +1 @@
+DIST eisl-2.50.tar.gz 1757697 BLAKE2B 83c68213522320c815d9c7930c58181adba6f7fd3387421b7c7de55aca0fb6cabd78f65543c71adb89408531ea59855aafcf5bafd466bf517626a49cd252641f SHA512 4865c09dbbc0db885af69ec5ef0a731e2f55455f296b343b1cb05d3233e1e18c397b3b0a21eb0a6a86f85f20bf4e62f5e968fdf3cab45f6b5e3e3f9ee27d5e80
diff --git a/dev-lang/eisl/eisl-2.50.ebuild b/dev-lang/eisl/eisl-2.50.ebuild
new file mode 100644
index 0000000000000..fcc0fddcbb372
--- /dev/null
+++ b/dev-lang/eisl/eisl-2.50.ebuild
@@ -0,0 +1,33 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit toolchain-funcs
+
+DESCRIPTION="Interpreter and compiler compatible for the ISLisp standard"
+HOMEPAGE="https://github.com/sasagawa888/eisl/"
+SRC_URI="https://github.com/sasagawa888/eisl/archive/v${PV}.tar.gz
+			-> ${P}.tar.gz"
+
+LICENSE="BSD-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+RESTRICT="test"  # Tests run cppcheck (and fail)
+
+DOCS=( README-ja.md README.md documents )
+
+RDEPEND="sys-libs/ncurses:="
+DEPEND="${RDEPEND}"
+
+PATCHES=( "${FILESDIR}"/${P}-Makefile.patch )
+
+src_compile() {
+	emake CC="$(tc-getCC)" clean all
+}
+
+src_install() {
+	dobin edlis eisl
+
+	einstalldocs
+}
diff --git a/dev-lang/eisl/files/eisl-2.50-Makefile.patch b/dev-lang/eisl/files/eisl-2.50-Makefile.patch
new file mode 100644
index 0000000000000..3c30adff8fd2c
--- /dev/null
+++ b/dev-lang/eisl/files/eisl-2.50-Makefile.patch
@@ -0,0 +1,33 @@
+--- a/makefile
++++ b/makefile
+@@ -29,7 +29,7 @@ else
+ 		CURSES_LIBS := $(shell ncurses6-config --libs)
+ 	endif
+ endif
+-CFLAGS := $(INCS) -Wall -Wextra -D_FORTIFY_SOURCE=2 $(CURSES_CFLAGS) -U_XOPEN_SOURCE -D_XOPEN_SOURCE=700 -Inana/src
++CFLAGS += $(INCS) -Wall -Wextra $(CURSES_CFLAGS) -U_XOPEN_SOURCE -D_XOPEN_SOURCE=700 -Inana/src
+ DFLAGS := --O3 --release --betterC
+ SRC_CII := cii/src/except.c cii/src/fmt.c cii/src/str.c cii/src/text.c
+ SRC_D := dextension.d disl.d
+@@ -42,7 +42,7 @@ ifeq ($(DEBUG),1)
+ 		LDFLAGS := -fsanitize=undefined
+ 	endif
+ else
+-	CFLAGS += -O3 -flto -DNDEBUG=1 -DWITHOUT_NANA=1
++	CFLAGS += -DNDEBUG=1 -DWITHOUT_NANA=1
+ 	SRC_CII += cii/src/mem.c
+ endif
+ OBJ_CII := $(SRC_CII:.c=.o)
+@@ -56,11 +56,10 @@ else
+ 	CFLAGS += -std=c17
+ endif
+ ifneq ($(DEBUG),1)
+-	LDFLAGS += -flto
+ 	ifeq ($(OPSYS),macos)
+ 		LDFLAGS += -Wl,-S,-x
+ 	else
+-		LDFLAGS += -s
++		LDFLAGS +=
+ 	endif
+ endif
+ PREFIX := /usr/local
diff --git a/dev-lang/eisl/metadata.xml b/dev-lang/eisl/metadata.xml
new file mode 100644
index 0000000000000..4351ebea821eb
--- /dev/null
+++ b/dev-lang/eisl/metadata.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+
+<pkgmetadata>
+  <maintainer type="person">
+    <email>xgqt@gentoo.org</email>
+    <name>Maciej Barć</name>
+  </maintainer>
+  <longdescription>
+    Easy-ISLisp(EISL) is an interpreter and compiler compatible with the ISLisp
+    standard. EISL was written by Kenichi Sasagawa
+    https://qiita.com/sym_num/items/793adfe118514668e5b0
+  </longdescription>
+  <upstream>
+    <bugs-to>https://github.com/sasagawa888/eisl/issues</bugs-to>
+    <remote-id type="github">sasagawa888/eisl</remote-id>
+  </upstream>
+</pkgmetadata>