diff --git a/__tests__/externals/zip b/__tests__/externals/zip
deleted file mode 100755
index 1bbc48e..0000000
Binary files a/__tests__/externals/zip and /dev/null differ
diff --git a/__tests__/externals/zip-darwin b/__tests__/externals/zip-darwin
deleted file mode 100755
index 60424b0..0000000
Binary files a/__tests__/externals/zip-darwin and /dev/null differ
diff --git a/__tests__/tool-cache.test.ts b/__tests__/tool-cache.test.ts
index 35f90be..ff85a20 100644
--- a/__tests__/tool-cache.test.ts
+++ b/__tests__/tool-cache.test.ts
@@ -287,9 +287,7 @@ describe('@actions/tool-cache', function() {
         ]
         await exec.exec(`"${powershellPath}"`, args)
       } else {
-        const zipBin: string =
-          process.platform === 'darwin' ? 'zip-darwin' : 'zip'
-        const zipPath: string = path.join(__dirname, 'externals', zipBin)
+        const zipPath: string = await io.which('zip')
         await exec.exec(`"${zipPath}`, [zipFile, '-r', '.'], {cwd: stagingDir})
       }
 
@@ -340,9 +338,7 @@ describe('@actions/tool-cache', function() {
         ]
         await exec.exec(`"${powershellPath}"`, args)
       } else {
-        const zipBin: string =
-          process.platform === 'darwin' ? 'zip-darwin' : 'zip'
-        const zipPath = path.join(__dirname, 'externals', zipBin)
+        const zipPath: string = await io.which('zip')
         await exec.exec(zipPath, [zipFile, '-r', '.'], {cwd: stagingDir})
       }
 
diff --git a/package-lock.json b/package-lock.json
index 9b7e0ed..ffea2aa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
 	"name": "@actions/tool-cache",
-	"version": "1.1.0",
+	"version": "1.1.1",
 	"lockfileVersion": 1,
 	"requires": true,
 	"dependencies": {
diff --git a/scripts/externals/unzip b/scripts/externals/unzip
deleted file mode 100755
index 4082418..0000000
Binary files a/scripts/externals/unzip and /dev/null differ
diff --git a/scripts/externals/unzip-darwin b/scripts/externals/unzip-darwin
deleted file mode 100755
index 4ef1504..0000000
Binary files a/scripts/externals/unzip-darwin and /dev/null differ
diff --git a/src/tool-cache.ts b/src/tool-cache.ts
index 0dd556c..9ab2deb 100644
--- a/src/tool-cache.ts
+++ b/src/tool-cache.ts
@@ -223,11 +223,7 @@ export async function extractZip(file: string, dest?: string): Promise<string> {
   if (IS_WINDOWS) {
     await extractZipWin(file, dest)
   } else {
-    if (process.platform === 'darwin') {
-      await extractZipDarwin(file, dest)
-    } else {
-      await extractZipNix(file, dest)
-    }
+    await extractZipNix(file, dest)
   }
 
   return dest
@@ -255,18 +251,7 @@ async function extractZipWin(file: string, dest: string): Promise<void> {
 }
 
 async function extractZipNix(file: string, dest: string): Promise<void> {
-  const unzipPath = path.join(__dirname, '..', 'scripts', 'externals', 'unzip')
-  await exec(`"${unzipPath}"`, [file], {cwd: dest})
-}
-
-async function extractZipDarwin(file: string, dest: string): Promise<void> {
-  const unzipPath = path.join(
-    __dirname,
-    '..',
-    'scripts',
-    'externals',
-    'unzip-darwin'
-  )
+  const unzipPath = await io.which('unzip')
   await exec(`"${unzipPath}"`, [file], {cwd: dest})
 }