diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..681a41d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/cjs-module-lexer-1.2.3.tar.gz
+/cjs-module-lexer-1.2.3-nm-dev.tgz
+/cjs-module-lexer-1.2.3-bundled-licenses.txt
diff --git a/0001-parametrize-wasm-compilation-process.patch b/0001-parametrize-wasm-compilation-process.patch
new file mode 100644
index 0000000..d84660f
--- /dev/null
+++ b/0001-parametrize-wasm-compilation-process.patch
@@ -0,0 +1,89 @@
+From 182e2768a4029365144d287257be0ca606c0ab40 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Jan=20Stan=C4=9Bk?= <jstanek@redhat.com>
+Date: Mon, 26 Jun 2023 09:05:38 +0200
+Subject: [PATCH] Parametrize WASM compilation process (#87)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+* Makefile: extract compilation flags to variables
+
+Previously, the WASM compilation step was hard to adjust for different
+systems, as it required re-writing the actual rule.
+
+This change extracts all the flags into make variables,
+and separates them into system- and project-specific ones.
+
+The system-specific ones are expected to change from machine to machine,
+and now can be easily overridden:
+
+    $ make WASM_CC=clang WASM_CFLAGS=--target=wasm32-wasi …
+
+The project-specific flags are also extracted to variables,
+although at this point this is mainly for consistency sake.
+
+* Makefile: parametrize all binaries
+
+Similarly to previous change,
+this allows for all binary paths to be easily adjusted.
+
+* Makefile: polish
+
+Tiny leftover nitpicks:
+
+- Mark `optimize` and `clean` targets as phony
+- Use separate target for `lib/` directory creation
+- Use make's built-in `$(RM)` command
+---
+ Makefile | 39 ++++++++++++++++++++++++++++-----------
+ 1 file changed, 28 insertions(+), 11 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index 3098484..961b336 100755
+--- a/Makefile
++++ b/Makefile
+@@ -1,16 +1,33 @@
+-lslib/lexer.wat: lib/lexer.wasm
+-	../wabt/bin/wasm2wat lib/lexer.wasm -o lib/lexer.wat
++# These flags depend on the system and may be overridden
++WASM_CC := ../wasi-sdk-12.0/bin/clang
++WASM_CFLAGS := --sysroot=../wasi-sdk-12.0/share/wasi-sysroot
++WASM_LDFLAGS := -nostartfiles
+ 
+-lib/lexer.wasm: include-wasm/cjs-module-lexer.h src/lexer.c
+-	@mkdir -p lib
+-	../wasi-sdk-12.0/bin/clang src/lexer.c -I include-wasm --sysroot=../wasi-sdk-12.0/share/wasi-sysroot -o lib/lexer.wasm -nostartfiles \
+-	-Wl,-z,stack-size=13312,--no-entry,--compress-relocations,--strip-all,--export=__heap_base,\
+-	--export=parseCJS,--export=sa,--export=e,--export=re,--export=es,--export=ee,--export=rre,--export=ree,--export=res,--export=ru,--export=us,--export=ue \
+-	-Wno-logical-op-parentheses -Wno-parentheses \
+-	-Oz
++WASM2WAT := ../wabt/bin/wasm2wat
++WASM_OPT := ../binaryen/bin/wasm-opt
++
++# These are project-specific and are expected to be kept intact
++WASM_EXTRA_CFLAGS := -I include-wasm/ -Wno-logical-op-parentheses -Wno-parentheses -Oz
++WASM_EXTRA_LDFLAGS := -Wl,-z,stack-size=13312,--no-entry,--compress-relocations,--strip-all
++WASM_EXTRA_LDFLAGS += -Wl,--export=__heap_base,--export=parseCJS,--export=sa
++WASM_EXTRA_LDFLAGS += -Wl,--export=e,--export=re,--export=es,--export=ee
++WASM_EXTRA_LDFLAGS += -Wl,--export=rre,--export=ree,--export=res,--export=ru,--export=us,--export=ue
++
++.PHONY: optimize clean
++
++lib/lexer.wat: lib/lexer.wasm
++	$(WASM2WAT) lib/lexer.wasm -o lib/lexer.wat
++
++lib/lexer.wasm: include-wasm/cjs-module-lexer.h src/lexer.c | lib/
++	$(WASM_CC) $(WASM_CFLAGS) $(WASM_EXTRA_CFLAGS) \
++		src/lexer.c -o lib/lexer.wasm \
++		$(WASM_LDFLAGS) $(WASM_EXTRA_LDFLAGS)
++
++lib/:
++	@mkdir -p $@
+ 
+ optimize: lib/lexer.wasm
+-	../binaryen/bin/wasm-opt -Oz lib/lexer.wasm -o lib/lexer.wasm
++	$(WASM_OPT) -Oz lib/lexer.wasm -o lib/lexer.wasm
+ 
+ clean:
+-	rm lib/*
++	$(RM) lib/*
diff --git a/nodejs-cjs-module-lexer.spec b/nodejs-cjs-module-lexer.spec
new file mode 100644
index 0000000..b7e9105
--- /dev/null
+++ b/nodejs-cjs-module-lexer.spec
@@ -0,0 +1,68 @@
+%global     npm_name cjs-module-lexer
+%global     prebuilt_blobs lib/lexer.wasm
+
+Name:       nodejs-%{npm_name}
+Summary:    A very fast lexer used to detect the named exports of a CommonJS module
+Version:    1.2.3
+Release:    %autorelease
+
+License:    MIT
+URL:        https://www.npmjs.com/package/cjs-module-lexer
+# The npmjs.org archive does not contain sources, only built artifacts
+Source:     https://github.com/nodejs/%{npm_name}/archive/%{version}/%{npm_name}-%{version}.tar.gz
+# Production archive is not needed
+Source2:     %{npm_name}-%{version}-nm-dev.tgz
+Source3:     %{npm_name}-%{version}-bundled-licenses.txt
+
+# Adapt Makefile for easier rebuilds
+Patch:      0001-parametrize-wasm-compilation-process.patch
+
+# Binary files in this package are aimed at the wasm32-wasi "architecture".
+%global     _binaries_in_noarch_packages_terminate_build 0
+BuildArch:  noarch
+ExclusiveArch: %{nodejs_arches} noarch
+
+BuildRequires: clang lld make wasi-libc-devel
+BuildRequires: nodejs-devel npm
+# for autosetup -S git_am
+BuildRequires: git-core
+
+%description
+A very fast JS CommonJS module syntax lexer used to detect the most likely list
+of named exports of a CommonJS module.  This project is used in Node.js core
+for detecting the named exports available when importing a CJS module into ESM,
+and is maintained for this purpose.
+
+%prep
+%autosetup -n %{npm_name}-%{version} -S git_am
+cp -p %{S:3} .
+
+%build
+rm -rf %{prebuilt_blobs}
+tar -xzf %{S:2} && ln -rsf node_modules_dev node_modules
+
+%make_build -j1 \
+    WASM_CC=clang \
+    WASM_CFLAGS='--target=wasm32-wasi --sysroot=/usr/wasm32-wasi' \
+    WASM_LDFLAGS='-nostartfiles -nodefaultlibs -lc' \
+    clean lib/lexer.wasm
+
+npm --offline run build
+npm --offline pack
+
+%install
+mkdir -p %{buildroot}%{nodejs_sitelib}/%{npm_name}
+tar --strip-components=1 -xzf %{npm_name}-%{version}.tgz -C %{buildroot}%{nodejs_sitelib}/%{npm_name}
+
+%check
+%{__nodejs} -e 'require("./")'
+%nodejs_symlink_deps --check
+npm --offline run test
+
+%files
+%license LICENSE %{npm_name}-%{version}-bundled-licenses.txt
+%doc README.md
+%{nodejs_sitelib}/%{npm_name}/
+
+%changelog
+%autochangelog
diff --git a/sources b/sources
new file mode 100644
index 0000000..4c60588
--- /dev/null
+++ b/sources
@@ -0,0 +1,3 @@
+SHA512 (cjs-module-lexer-1.2.3.tar.gz) = dab77f606c0b0c12abf9e91994cd56b3492e45ecb6e615236abb948fa2a66146d25776bb895b4b25a1b3cb15168eb073b07ff405da47d3b2a1e62428171b4f76
+SHA512 (cjs-module-lexer-1.2.3-nm-dev.tgz) = 44d91bfe4e782a47d0506ec5d0bf12877083b263222535019efd0e0d50614d6688edde17571025ddd9c8f1c2a428974bfb59ee9d9c97d1b7e20150785cfab3de
+SHA512 (cjs-module-lexer-1.2.3-bundled-licenses.txt) = 3e591adb16e09b1c6fb75eb97a6ac51cd06e0aeae2bd5950a15902346e2c9626cb50203bfd0e15c7e8c98af8f24b81c1ce6617c359e7c0e7d0a6366457c844ba