diff --git a/tools/license-builder.sh b/tools/license-builder.sh
index 50f4474c644441..e001e87a4f2250 100755
--- a/tools/license-builder.sh
+++ b/tools/license-builder.sh
@@ -1,23 +1,23 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 set -e
 
-rootdir="$(CDPATH= cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+rootdir="$(CDPATH='' cd "$(dirname "$0")/.." && pwd)"
 licensefile="${rootdir}/LICENSE"
-licensehead="$(sed '/^- /,$d' ${licensefile})"
+licensehead="$(sed '/^- /,$d' "${licensefile}")"
 tmplicense="${rootdir}/~LICENSE.$$"
-echo -e "$licensehead" > $tmplicense
+echo "$licensehead" > "$tmplicense"
 
 
 # addlicense <library> <location> <license text>
-function addlicense {
+addlicense() {
 
   echo "
 - ${1}, located at ${2}, is licensed as follows:
   \"\"\"
-$(echo -e "$3" | sed -e 's/^/    /' -e 's/^    $//' -e 's/ *$//' | sed -e '/./,$!d' | sed -e '/^$/N;/^\n$/D')
+$(echo "$3" | sed -e 's/^/    /' -e 's/^    $//' -e 's/ *$//' | sed -e '/./,$!d' | sed -e '/^$/N;/^\n$/D')
   \"\"\"\
-" >> $tmplicense
+" >> "$tmplicense"
 
 }
 
@@ -29,79 +29,79 @@ fi
 
 
 # Dependencies bundled in distributions
-addlicense "Acorn" "deps/acorn" "$(cat ${rootdir}/deps/acorn/acorn/LICENSE)"
-addlicense "Acorn plugins" "deps/acorn-plugins" "$(cat ${rootdir}/deps/acorn-plugins/acorn-class-fields/LICENSE)"
-addlicense "c-ares" "deps/cares" "$(tail -n +3 ${rootdir}/deps/cares/LICENSE.md)"
-addlicense "cjs-module-lexer" "deps/cjs-module-lexer" "$(cat ${rootdir}/deps/cjs-module-lexer/LICENSE)"
+addlicense "Acorn" "deps/acorn" "$(cat "${rootdir}"/deps/acorn/acorn/LICENSE)"
+addlicense "Acorn plugins" "deps/acorn-plugins" "$(cat "${rootdir}"/deps/acorn-plugins/acorn-class-fields/LICENSE)"
+addlicense "c-ares" "deps/cares" "$(tail -n +3 "${rootdir}"/deps/cares/LICENSE.md)"
+addlicense "cjs-module-lexer" "deps/cjs-module-lexer" "$(cat "${rootdir}"/deps/cjs-module-lexer/LICENSE)"
 if [ -f "${rootdir}/deps/icu/LICENSE" ]; then
   # ICU 57 and following. Drop the BOM
   addlicense "ICU" "deps/icu" \
             "$(sed -e '1s/^[^a-zA-Z ]*ICU/ICU/' -e :a \
-              -e 's/<[^>]*>//g;s/	/ /g;s/ +$//;/</N;//ba' ${rootdir}/deps/icu/LICENSE)"
+              -e 's/<[^>]*>//g;s/	/ /g;s/ +$//;/</N;//ba' "${rootdir}"/deps/icu/LICENSE)"
 elif [ -f "${rootdir}/deps/icu/license.html" ]; then
   # ICU 56 and prior
   addlicense "ICU" "deps/icu" \
             "$(sed -e '1,/ICU License - ICU 1\.8\.1 and later/d' -e :a \
-              -e 's/<[^>]*>//g;s/	/ /g;s/ +$//;/</N;//ba' ${rootdir}/deps/icu/license.html)"
+              -e 's/<[^>]*>//g;s/	/ /g;s/ +$//;/</N;//ba' "${rootdir}"/deps/icu/license.html)"
 elif [ -f "${rootdir}/deps/icu-small/LICENSE" ]; then
   # ICU 57 and following. Drop the BOM
   addlicense "ICU" "deps/icu-small" \
             "$(sed -e '1s/^[^a-zA-Z ]*ICU/ICU/' -e :a \
-              -e 's/<[^>]*>//g;s/	/ /g;s/ +$//;/</N;//ba' ${rootdir}/deps/icu-small/LICENSE)"
+              -e 's/<[^>]*>//g;s/	/ /g;s/ +$//;/</N;//ba' "${rootdir}"/deps/icu-small/LICENSE)"
 elif [ -f "${rootdir}/deps/icu-small/license.html" ]; then
   # ICU 56 and prior
   addlicense "ICU" "deps/icu-small" \
             "$(sed -e '1,/ICU License - ICU 1\.8\.1 and later/d' -e :a \
-              -e 's/<[^>]*>//g;s/	/ /g;s/ +$//;/</N;//ba' ${rootdir}/deps/icu-small/license.html)"
+              -e 's/<[^>]*>//g;s/	/ /g;s/ +$//;/</N;//ba' "${rootdir}"/deps/icu-small/license.html)"
 else
   echo "Could not find an ICU license file."
   exit 1
 fi
 
-addlicense "libuv" "deps/uv" "$(cat ${rootdir}/deps/uv/LICENSE)"
+addlicense "libuv" "deps/uv" "$(cat "${rootdir}"/deps/uv/LICENSE)"
 addlicense "llhttp" "deps/llhttp" "$(cat deps/llhttp/LICENSE-MIT)"
 addlicense "OpenSSL" "deps/openssl" \
-           "$(sed -e '/^ \*\/$/,$d' -e '/^ [^*].*$/d' -e '/\/\*.*$/d' -e '/^$/d' -e 's/^[/ ]\* *//' ${rootdir}/deps/openssl/openssl/LICENSE)"
+           "$(sed -e '/^ \*\/$/,$d' -e '/^ [^*].*$/d' -e '/\/\*.*$/d' -e '/^$/d' -e 's/^[/ ]\* *//' "${rootdir}"/deps/openssl/openssl/LICENSE)"
 addlicense "Punycode.js" "lib/punycode.js" \
            "$(curl -sL https://raw.githubusercontent.com/bestiejs/punycode.js/master/LICENSE-MIT.txt)"
-addlicense "V8" "deps/v8" "$(cat ${rootdir}/deps/v8/LICENSE)"
+addlicense "V8" "deps/v8" "$(cat "${rootdir}"/deps/v8/LICENSE)"
 addlicense "SipHash" "deps/v8/src/third_party/siphash" \
            "$(sed -e '/You should have received a copy of the CC0/,$d' -e 's/^\/\* *//' -e 's/^ \* *//' deps/v8/src/third_party/siphash/halfsiphash.cc)"
 addlicense "zlib" "deps/zlib" \
-           "$(sed -e '/The data format used by the zlib library/,$d' -e 's/^\/\* *//' -e 's/^ *//' ${rootdir}/deps/zlib/zlib.h)"
+           "$(sed -e '/The data format used by the zlib library/,$d' -e 's/^\/\* *//' -e 's/^ *//' "${rootdir}"/deps/zlib/zlib.h)"
 
 # npm
-addlicense "npm" "deps/npm" "$(cat ${rootdir}/deps/npm/LICENSE)"
+addlicense "npm" "deps/npm" "$(cat "${rootdir}"/deps/npm/LICENSE)"
 
 # Build tools
-addlicense "GYP" "tools/gyp" "$(cat ${rootdir}/tools/gyp/LICENSE)"
-addlicense "inspector_protocol" "tools/inspector_protocol" "$(cat ${rootdir}/tools/inspector_protocol/LICENSE)"
-addlicense "jinja2" "tools/inspector_protocol/jinja2" "$(cat ${rootdir}/tools/inspector_protocol/jinja2/LICENSE)"
-addlicense "markupsafe" "tools/inspector_protocol/markupsafe" "$(cat ${rootdir}/tools/inspector_protocol/markupsafe/LICENSE)"
+addlicense "GYP" "tools/gyp" "$(cat "${rootdir}"/tools/gyp/LICENSE)"
+addlicense "inspector_protocol" "tools/inspector_protocol" "$(cat "${rootdir}"/tools/inspector_protocol/LICENSE)"
+addlicense "jinja2" "tools/inspector_protocol/jinja2" "$(cat "${rootdir}"/tools/inspector_protocol/jinja2/LICENSE)"
+addlicense "markupsafe" "tools/inspector_protocol/markupsafe" "$(cat "${rootdir}"/tools/inspector_protocol/markupsafe/LICENSE)"
 
 # Testing tools
 addlicense "cpplint.py" "tools/cpplint.py" \
-           "$(sed -e '/^$/,$d' -e 's/^#$//' -e 's/^# //' ${rootdir}/tools/cpplint.py | tail -n +3)"
-addlicense "ESLint" "tools/node_modules/eslint" "$(cat ${rootdir}/tools/node_modules/eslint/LICENSE)"
-addlicense "babel-eslint" "tools/node_modules/babel-eslint" "$(cat ${rootdir}/tools/node_modules/babel-eslint/LICENSE)"
-addlicense "gtest" "test/cctest/gtest" "$(cat ${rootdir}/test/cctest/gtest/LICENSE)"
+           "$(sed -e '/^$/,$d' -e 's/^#$//' -e 's/^# //' "${rootdir}"/tools/cpplint.py | tail -n +3)"
+addlicense "ESLint" "tools/node_modules/eslint" "$(cat "${rootdir}"/tools/node_modules/eslint/LICENSE)"
+addlicense "babel-eslint" "tools/node_modules/babel-eslint" "$(cat "${rootdir}"/tools/node_modules/babel-eslint/LICENSE)"
+addlicense "gtest" "test/cctest/gtest" "$(cat "${rootdir}"/test/cctest/gtest/LICENSE)"
 
 # nghttp2
-addlicense "nghttp2" "deps/nghttp2" "$(cat ${rootdir}/deps/nghttp2/COPYING)"
+addlicense "nghttp2" "deps/nghttp2" "$(cat "${rootdir}"/deps/nghttp2/COPYING)"
 
 # node-inspect
-addlicense "node-inspect" "deps/node-inspect" "$(cat ${rootdir}/deps/node-inspect/LICENSE)"
+addlicense "node-inspect" "deps/node-inspect" "$(cat "${rootdir}"/deps/node-inspect/LICENSE)"
 
 # large_pages
-addlicense "large_pages" "src/large_pages" "$(sed -e '/SPDX-License-Identifier/,$d' -e 's/^\/\///' ${rootdir}/src/large_pages/node_large_page.h)"
+addlicense "large_pages" "src/large_pages" "$(sed -e '/SPDX-License-Identifier/,$d' -e 's/^\/\///' "${rootdir}"/src/large_pages/node_large_page.h)"
 
 # deep_freeze
-addlicense "caja" "lib/internal/freeze_intrinsics.js" "$(sed -e '/SPDX-License-Identifier/,$d' -e 's/^\/\///' ${rootdir}/lib/internal/freeze_intrinsics.js)"
+addlicense "caja" "lib/internal/freeze_intrinsics.js" "$(sed -e '/SPDX-License-Identifier/,$d' -e 's/^\/\///' "${rootdir}"/lib/internal/freeze_intrinsics.js)"
 
 # brotli
-addlicense "brotli" "deps/brotli" "$(cat ${rootdir}/deps/brotli/LICENSE)"
+addlicense "brotli" "deps/brotli" "$(cat "${rootdir}"/deps/brotli/LICENSE)"
 
-addlicense "HdrHistogram" "deps/histogram" "$(cat ${rootdir}/deps/histogram/LICENSE.txt)"
+addlicense "HdrHistogram" "deps/histogram" "$(cat "${rootdir}"/deps/histogram/LICENSE.txt)"
 
 addlicense "highlight.js" "doc/api_assets/highlight.pack.js" \
            "$(curl -sL https://raw.githubusercontent.com/highlightjs/highlight.js/63f367c46f2eeb6f9b7a3545e325eeeb917f9942/LICENSE)"
@@ -112,6 +112,6 @@ addlicense "node-heapdump" "src/heap_utils.cc" \
 addlicense "rimraf" "lib/internal/fs/rimraf.js" \
            "$(curl -sL https://raw.githubusercontent.com/isaacs/rimraf/0e365ac4e4d64a25aa2a3cc026348f13410210e1/LICENSE)"
 
-addlicense "uvwasi" "deps/uvwasi" "$(cat ${rootdir}/deps/uvwasi/LICENSE)"
+addlicense "uvwasi" "deps/uvwasi" "$(cat "${rootdir}"/deps/uvwasi/LICENSE)"
 
-mv $tmplicense $licensefile
+mv "$tmplicense" "$licensefile"