diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bb99481c..02e7d47b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -157,22 +157,25 @@ jobs:
         development: [false, true]
         include:
         - os: macos-latest
-          swift: '5.0.0'
+          swift: '5.0.0' # oldest
           development: false
         - os: macos-13
-          swift: '5.9'
+          swift: 'latest' # action caching architecture mismatch
+          development: false
+        - os: macos-13
+          swift: '5.9' # Xcode toolchain inclusion optimization
           development: false
         - os: windows-latest
-          swift: '5.9'
+          swift: '5.9' # 2nd installation approach
           development: false
         - os: ubuntu-latest
-          swift: '5.3.0'
+          swift: '5.3.0' # oldest
           development: false
         - os: windows-latest
-          swift: '5.3'
+          swift: '5.3' # 1st installation approach
           development: false
         - os: ubuntu-22.04
-          swift: ${{ fromJSON(vars.SETUPSWIFT_CUSTOM_TOOLCHAINS).ubuntu2204 }}
+          swift: ${{ fromJSON(vars.SETUPSWIFT_CUSTOM_TOOLCHAINS).ubuntu2204 }} # custom toolchain
           development: true
 
     steps:
@@ -223,8 +226,10 @@ jobs:
       with:
         script: |
           const os = require('os');
+          const path = require('path');
           const fs = require('fs/promises');
           const toolCache = require('@actions/tool-cache');
+          const {exec: actionExec} = require('@actions/exec');
           let arch = '';
           switch (os.arch()) {
             case 'x64':
@@ -242,22 +247,25 @@ jobs:
             core.debug(`Toolcache not set`);
             return;
           }
-          const tools = toolCache.findAllVersions(key, arch);
-          if (!tools.length) {
-            core.debug(`No tools found for "${key}" with arch ${arch}`);
+          const versions = toolCache.findAllVersions(key, arch);
+          if (!versions.length) {
+            core.debug(`No versions found for "${key}" with arch ${arch}`);
             return;
           } else {
-            core.debug(`Found tools "${tools.join(', ')}" for "${key}" with arch ${arch}`);
+            core.debug(`Found versions "${versions.join(', ')}" for "${key}" with arch ${arch}`);
           }
-          const tool = tools[0];
+          const tool = toolCache.find(key, versions[0], arch).trim();
           await fs.access(tool);
-          return { key: key, tool: tool };
+          const tmpDir = process.env.RUNNER_TEMP || os.tmpdir();
+          const zip = path.join(tmpDir, `${key}.zip`);
+          await actionExec('zip', ['-r', zip, tool, '-x', '*.DS_Store']);
+          return { key: key, tool: zip };
 
     - name: Upload cached installation as artifact
       if: always() && steps.get-tool.outputs.result != ''
       uses: actions/upload-artifact@v4
       with:
-        name: ${{ fromJson(steps.get-tool.outputs.result).key }}-tool
+        name: ${{ fromJson(steps.get-tool.outputs.result).key }}-${{ matrix.os }}-tool
         path: ${{ fromJson(steps.get-tool.outputs.result).tool }}
 
   dry-run:
diff --git a/__tests__/installer/linux.test.ts b/__tests__/installer/linux.test.ts
index cb07e2c2..18671e5f 100644
--- a/__tests__/installer/linux.test.ts
+++ b/__tests__/installer/linux.test.ts
@@ -71,30 +71,48 @@ describe('linux toolchain installation verification', () => {
     expect(process.env.PATH?.includes(swiftPath)).toBeTruthy()
   })
 
-  it('tests installation with download', async () => {
-    const installer = new LinuxToolchainInstaller(toolchain)
-    const download = path.resolve('tool', 'download', 'path')
-    const extracted = path.resolve('tool', 'extracted', 'path')
-    const cached = path.resolve('tool', 'cached', 'path')
-    const swiftPath = path.join(cached, 'usr', 'bin')
-    jest.spyOn(core, 'getBooleanInput').mockReturnValue(true)
-    jest.spyOn(cache, 'restoreCache').mockResolvedValue(undefined)
-    jest.spyOn(cache, 'saveCache').mockResolvedValue(1)
-    jest.spyOn(toolCache, 'find').mockReturnValue('')
-    jest.spyOn(fs, 'cp').mockResolvedValue()
-    const downloadSpy = jest.spyOn(toolCache, 'downloadTool')
-    downloadSpy.mockResolvedValue(download)
-    const extractSpy = jest.spyOn(toolCache, 'extractTar')
-    extractSpy.mockResolvedValue(extracted)
-    const cacheSpy = jest.spyOn(toolCache, 'cacheDir')
-    cacheSpy.mockResolvedValue(cached)
-    jest.spyOn(exec, 'exec').mockResolvedValue(0)
-    await installer.install()
-    expect(process.env.PATH?.includes(swiftPath)).toBeTruthy()
-    for (const spy of [downloadSpy, extractSpy, cacheSpy]) {
-      expect(spy).toHaveBeenCalled()
+  it.each(['aarch64', 'x86_64'])(
+    'tests installation with download for arch %s',
+    async arch => {
+      const installer = new LinuxToolchainInstaller(toolchain)
+      const download = path.resolve('tool', 'download', 'path')
+      const extracted = path.resolve('tool', 'extracted', 'path')
+      const cached = path.resolve('tool', 'cached', 'path')
+      const swiftPath = path.join(cached, 'usr', 'bin')
+      jest.spyOn(core, 'getBooleanInput').mockReturnValue(true)
+      jest.spyOn(cache, 'restoreCache').mockResolvedValue(undefined)
+      jest.spyOn(toolCache, 'find').mockReturnValue('')
+      jest.spyOn(fs, 'cp').mockResolvedValue()
+      const downloadSpy = jest.spyOn(toolCache, 'downloadTool')
+      downloadSpy.mockResolvedValue(download)
+      const extractSpy = jest.spyOn(toolCache, 'extractTar')
+      extractSpy.mockResolvedValue(extracted)
+      const toolCacheSpy = jest.spyOn(toolCache, 'cacheDir')
+      toolCacheSpy.mockResolvedValue(cached)
+      const actionCacheSpy = jest.spyOn(cache, 'saveCache')
+      actionCacheSpy.mockResolvedValue(1)
+      jest.spyOn(exec, 'exec').mockResolvedValue(0)
+      await installer.install(arch)
+      expect(process.env.PATH?.includes(swiftPath)).toBeTruthy()
+      for (const spy of [
+        downloadSpy,
+        extractSpy,
+        toolCacheSpy,
+        actionCacheSpy
+      ]) {
+        expect(spy).toHaveBeenCalled()
+      }
+      const toolCacheKey = `${toolchain.dir}-${toolchain.platform}`
+      const actionCacheKey = `${toolCacheKey}-${arch}`
+      const toolDir = path.basename(toolchain.download, '.tar.gz')
+      const cachedTool = path.join(extracted, toolDir)
+      expect(toolCacheSpy.mock.calls[0]?.[0]).toBe(cachedTool)
+      expect(toolCacheSpy.mock.calls[0]?.[1]).toBe(toolCacheKey)
+      expect(toolCacheSpy.mock.calls[0]?.[2]).toBe('5.8.0')
+      expect(toolCacheSpy.mock.calls[0]?.[3]).toBe(arch)
+      expect(actionCacheSpy.mock.calls[0]?.[1]).toBe(actionCacheKey)
     }
-  })
+  )
 
   it('tests installation with cache', async () => {
     const installer = new LinuxToolchainInstaller(toolchain)
@@ -107,7 +125,7 @@ describe('linux toolchain installation verification', () => {
     jest.spyOn(exec, 'exec').mockResolvedValue(0)
     const downloadSpy = jest.spyOn(toolCache, 'downloadTool')
     const extractSpy = jest.spyOn(toolCache, 'extractTar')
-    await installer.install()
+    await installer.install('aarch64')
     expect(process.env.PATH?.includes(swiftPath)).toBeTruthy()
     for (const spy of [downloadSpy, extractSpy]) {
       expect(spy).not.toHaveBeenCalled()
diff --git a/__tests__/installer/windows.test.ts b/__tests__/installer/windows.test.ts
index fd71c659..1b8f636d 100644
--- a/__tests__/installer/windows.test.ts
+++ b/__tests__/installer/windows.test.ts
@@ -255,7 +255,7 @@ describe('windows toolchain installation verification', () => {
       stdout: vsEnvs.join(os.EOL),
       stderr: ''
     })
-    await installer.install()
+    await installer.install('x86_64')
     expect(setupSpy).toHaveBeenCalled()
     expect(process.env.PATH?.includes(swiftPath)).toBeTruthy()
     expect(process.env.PATH?.includes(swiftDev)).toBeTruthy()
diff --git a/__tests__/installer/xcode.test.ts b/__tests__/installer/xcode.test.ts
index 885f9842..feddd2fe 100644
--- a/__tests__/installer/xcode.test.ts
+++ b/__tests__/installer/xcode.test.ts
@@ -46,7 +46,8 @@ describe('macOS toolchain installation verification', () => {
     const installationNeededSpy = jest.spyOn(installer, 'isInstallationNeeded')
     const downloadSpy = jest.spyOn(toolCache, 'downloadTool')
     const extractSpy = jest.spyOn(toolCache, 'extractXar')
-    await installer.install()
+    await installer.install('x86_64')
+    await installer.install('aarch64')
     for (const spy of [downloadSpy, extractSpy]) {
       expect(spy).not.toHaveBeenCalled()
     }
@@ -96,39 +97,58 @@ describe('macOS toolchain installation verification', () => {
     expect(process.env.TOOLCHAINS).toBe(identifier)
   })
 
-  it('tests installation with download', async () => {
-    const installer = new XcodeToolchainInstaller(toolchain)
-    const download = path.resolve('tool', 'download', 'path')
-    const extracted = path.resolve('tool', 'extracted', 'path')
-    const deployed = path.resolve('tool', 'deployed', 'path')
-    const cached = path.resolve('tool', 'cached', 'path')
-    const swiftPath = path.join(cached, 'usr', 'bin')
-    const identifier = 'org.swift.581202305171a'
-    jest.spyOn(installer, 'isInstallationNeeded').mockResolvedValue(true)
-    jest.spyOn(core, 'getBooleanInput').mockReturnValue(true)
-    jest.spyOn(cache, 'restoreCache').mockResolvedValue(undefined)
-    jest.spyOn(cache, 'saveCache').mockResolvedValue(1)
-    jest.spyOn(toolCache, 'find').mockReturnValue('')
-    jest.spyOn(exec, 'exec').mockResolvedValue(0)
-    jest.spyOn(fs, 'cp').mockResolvedValue()
-    const downloadSpy = jest.spyOn(toolCache, 'downloadTool')
-    downloadSpy.mockResolvedValue(download)
-    const extractSpy = jest.spyOn(toolCache, 'extractXar')
-    extractSpy.mockResolvedValue(extracted)
-    const deploySpy = jest.spyOn(toolCache, 'extractTar')
-    deploySpy.mockResolvedValue(deployed)
-    const cacheSpy = jest.spyOn(toolCache, 'cacheDir')
-    cacheSpy.mockResolvedValue(cached)
-    jest.spyOn(fs, 'access').mockResolvedValue()
-    jest.spyOn(fs, 'readFile').mockResolvedValue('')
-    jest.spyOn(plist, 'parse').mockReturnValue({CFBundleIdentifier: identifier})
-    await installer.install()
-    expect(process.env.PATH?.includes(swiftPath)).toBeTruthy()
-    expect(process.env.TOOLCHAINS).toBe(identifier)
-    for (const spy of [downloadSpy, extractSpy, deploySpy, cacheSpy]) {
-      expect(spy).toHaveBeenCalled()
+  it.each(['aarch64', 'x86_64'])(
+    'tests installation with download for %s',
+    async arch => {
+      const installer = new XcodeToolchainInstaller(toolchain)
+      const download = path.resolve('tool', 'download', 'path')
+      const extracted = path.resolve('tool', 'extracted', 'path')
+      const deployed = path.resolve('tool', 'deployed', 'path')
+      const cached = path.resolve('tool', 'cached', 'path')
+      const swiftPath = path.join(cached, 'usr', 'bin')
+      const identifier = 'org.swift.581202305171a'
+      jest.spyOn(installer, 'isInstallationNeeded').mockResolvedValue(true)
+      jest.spyOn(core, 'getBooleanInput').mockReturnValue(true)
+      jest.spyOn(cache, 'restoreCache').mockResolvedValue(undefined)
+      jest.spyOn(toolCache, 'find').mockReturnValue('')
+      jest.spyOn(exec, 'exec').mockResolvedValue(0)
+      jest.spyOn(fs, 'cp').mockResolvedValue()
+      const downloadSpy = jest.spyOn(toolCache, 'downloadTool')
+      downloadSpy.mockResolvedValue(download)
+      const extractSpy = jest.spyOn(toolCache, 'extractXar')
+      extractSpy.mockResolvedValue(extracted)
+      const deploySpy = jest.spyOn(toolCache, 'extractTar')
+      deploySpy.mockResolvedValue(deployed)
+      const toolCacheSpy = jest.spyOn(toolCache, 'cacheDir')
+      toolCacheSpy.mockResolvedValue(cached)
+      const actionCacheSpy = jest.spyOn(cache, 'saveCache')
+      actionCacheSpy.mockResolvedValue(1)
+      jest.spyOn(fs, 'access').mockResolvedValue()
+      jest.spyOn(fs, 'readFile').mockResolvedValue('')
+      jest
+        .spyOn(plist, 'parse')
+        .mockReturnValue({CFBundleIdentifier: identifier})
+      await installer.install(arch)
+      expect(process.env.PATH?.includes(swiftPath)).toBeTruthy()
+      expect(process.env.TOOLCHAINS).toBe(identifier)
+      for (const spy of [
+        downloadSpy,
+        extractSpy,
+        deploySpy,
+        toolCacheSpy,
+        actionCacheSpy
+      ]) {
+        expect(spy).toHaveBeenCalled()
+      }
+      const toolCacheKey = `${toolchain.dir}-${toolchain.platform}`
+      const actionCacheKey = `${toolCacheKey}-${arch}`
+      expect(toolCacheSpy.mock.calls[0]?.[0]).toBe(deployed)
+      expect(toolCacheSpy.mock.calls[0]?.[1]).toBe(toolCacheKey)
+      expect(toolCacheSpy.mock.calls[0]?.[2]).toBe('5.8.1')
+      expect(toolCacheSpy.mock.calls[0]?.[3]).toBe(arch)
+      expect(actionCacheSpy.mock.calls[0]?.[1]).toBe(actionCacheKey)
     }
-  })
+  )
 
   it('tests installation with cache', async () => {
     const installer = new XcodeToolchainInstaller(toolchain)
@@ -152,7 +172,7 @@ describe('macOS toolchain installation verification', () => {
     jest.spyOn(fs, 'access').mockResolvedValue()
     jest.spyOn(fs, 'readFile').mockResolvedValue('')
     jest.spyOn(plist, 'parse').mockReturnValue({CFBundleIdentifier: identifier})
-    await installer.install()
+    await installer.install('aarch64')
     expect(process.env.PATH?.includes(swiftPath)).toBeTruthy()
     expect(process.env.TOOLCHAINS).toBe(identifier)
     for (const spy of [downloadSpy, extractSpy, deploySpy]) {
@@ -170,7 +190,7 @@ describe('macOS toolchain installation verification', () => {
       stdout: `swift-driver version: 1.75.2 Apple Swift version 5.8.1 (swiftlang-5.8.0.124.5 clang-1403.0.22.11.100)\nTarget: arm64-apple-macosx13.0`,
       stderr: ''
     })
-    await expect(installer.install()).resolves
+    await expect(installer.install('aarch64')).resolves
     expect(process.env.DEVELOPER_DIR).toBe(toolchain.xcodePath)
   })
 
diff --git a/dist/index.js b/dist/index.js
index 11c7e07f..aeccfbe2 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -113,19 +113,20 @@ class ToolchainInstaller {
     install(arch) {
         return __awaiter(this, void 0, void 0, function* () {
             var _a;
-            const key = `${this.data.dir}-${this.data.platform}`;
+            const toolCacheKey = `${this.data.dir}-${this.data.platform}`;
+            const actionCacheKey = arch ? `${toolCacheKey}-${arch}` : toolCacheKey;
             const version = (_a = this.version) === null || _a === void 0 ? void 0 : _a.raw;
             let tool;
             let cacheHit = false;
             if (version) {
-                core.debug(`Finding tool with key: "${key}", version: "${version}" and arch: "${arch}" in tool cache`);
-                tool = toolCache.find(key, version, arch).trim();
+                core.debug(`Finding tool with key: "${toolCacheKey}", version: "${version}" and arch: "${arch}" in tool cache`);
+                tool = toolCache.find(toolCacheKey, version, arch).trim();
             }
             const tmpDir = process.env.RUNNER_TEMP || os.tmpdir();
-            const restore = path.join(tmpDir, 'setup-swift', key);
+            const restore = path.join(tmpDir, 'setup-swift', toolCacheKey);
             if (!(tool === null || tool === void 0 ? void 0 : tool.length)) {
-                if (yield cache.restoreCache([restore], key)) {
-                    core.debug(`Restored snapshot at "${restore}" from key "${key}"`);
+                if (yield cache.restoreCache([restore], actionCacheKey)) {
+                    core.debug(`Restored snapshot at "${restore}" from key "${actionCacheKey}"`);
                     tool = restore;
                     cacheHit = true;
                 }
@@ -141,9 +142,9 @@ class ToolchainInstaller {
                 cacheHit = true;
             }
             if (tool && version) {
-                tool = yield toolCache.cacheDir(tool, key, version, arch);
+                tool = yield toolCache.cacheDir(tool, toolCacheKey, version, arch);
                 if (core.isDebug()) {
-                    core.exportVariable('SWIFT_SETUP_TOOL_KEY', key);
+                    core.exportVariable('SWIFT_SETUP_TOOL_KEY', toolCacheKey);
                 }
                 core.debug(`Added to tool cache at "${tool}"`);
             }
@@ -152,8 +153,8 @@ class ToolchainInstaller {
                 !cacheHit &&
                 !this.data.preventCaching) {
                 yield fs_1.promises.cp(tool, restore, { recursive: true });
-                yield cache.saveCache([restore], key);
-                core.debug(`Saved to cache with key "${key}"`);
+                yield cache.saveCache([restore], actionCacheKey);
+                core.debug(`Saved to cache with key "${actionCacheKey}"`);
             }
             yield this.add(tool);
         });
diff --git a/src/installer/base.ts b/src/installer/base.ts
index cabf60a7..5dcbb794 100644
--- a/src/installer/base.ts
+++ b/src/installer/base.ts
@@ -39,23 +39,26 @@ export abstract class ToolchainInstaller<Snapshot extends ToolchainSnapshot> {
     }
   }
 
-  async install(arch?: string) {
-    const key = `${this.data.dir}-${this.data.platform}`
+  async install(arch: string) {
+    const toolCacheKey = `${this.data.dir}-${this.data.platform}`
+    const actionCacheKey = arch ? `${toolCacheKey}-${arch}` : toolCacheKey
     const version = this.version?.raw
     let tool: string | undefined
     let cacheHit = false
     if (version) {
       core.debug(
-        `Finding tool with key: "${key}", version: "${version}" and arch: "${arch}" in tool cache`
+        `Finding tool with key: "${toolCacheKey}", version: "${version}" and arch: "${arch}" in tool cache`
       )
-      tool = toolCache.find(key, version, arch).trim()
+      tool = toolCache.find(toolCacheKey, version, arch).trim()
     }
 
     const tmpDir = process.env.RUNNER_TEMP || os.tmpdir()
-    const restore = path.join(tmpDir, 'setup-swift', key)
+    const restore = path.join(tmpDir, 'setup-swift', toolCacheKey)
     if (!tool?.length) {
-      if (await cache.restoreCache([restore], key)) {
-        core.debug(`Restored snapshot at "${restore}" from key "${key}"`)
+      if (await cache.restoreCache([restore], actionCacheKey)) {
+        core.debug(
+          `Restored snapshot at "${restore}" from key "${actionCacheKey}"`
+        )
         tool = restore
         cacheHit = true
       } else {
@@ -70,9 +73,9 @@ export abstract class ToolchainInstaller<Snapshot extends ToolchainSnapshot> {
     }
 
     if (tool && version) {
-      tool = await toolCache.cacheDir(tool, key, version, arch)
+      tool = await toolCache.cacheDir(tool, toolCacheKey, version, arch)
       if (core.isDebug()) {
-        core.exportVariable('SWIFT_SETUP_TOOL_KEY', key)
+        core.exportVariable('SWIFT_SETUP_TOOL_KEY', toolCacheKey)
       }
       core.debug(`Added to tool cache at "${tool}"`)
     }
@@ -83,8 +86,8 @@ export abstract class ToolchainInstaller<Snapshot extends ToolchainSnapshot> {
       !this.data.preventCaching
     ) {
       await fs.cp(tool, restore, {recursive: true})
-      await cache.saveCache([restore], key)
-      core.debug(`Saved to cache with key "${key}"`)
+      await cache.saveCache([restore], actionCacheKey)
+      core.debug(`Saved to cache with key "${actionCacheKey}"`)
     }
     await this.add(tool)
   }
diff --git a/src/installer/xcode.ts b/src/installer/xcode.ts
index 7e2026cb..1b769743 100644
--- a/src/installer/xcode.ts
+++ b/src/installer/xcode.ts
@@ -41,7 +41,7 @@ export class XcodeToolchainInstaller extends ToolchainInstaller<XcodeToolchainSn
     return this.data.dir !== `swift-${version}-RELEASE`
   }
 
-  async install(arch?: string | undefined) {
+  async install(arch: string) {
     if (!(await this.isInstallationNeeded())) {
       return
     }