diff --git a/README.md b/README.md
index 8c63ca2d..8e57af1d 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@ jobs:
       # (and vcpkg does not run).
       - name: Setup anew (or from cache) vcpkg (and does not build any package)
         uses: lukka/run-vcpkg@v11 # Always specify the specific _version_ of the
-                                  # action you need, `v10` in this case to stay up
+                                  # action you need, `v11` in this case to stay up
                                   # to date with fixes on the v11 branch.
         #with:
           # This is the default location of the directory containing vcpkg sources.
diff --git a/dist/index.js b/dist/index.js
index e0c41e47..e2936b00 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -44416,25 +44416,35 @@ class BaseUtilLib {
         this.baseLib.writeFile(file, content);
     }
     getDefaultTriplet() {
+        var _a, _b;
         const envVar = process.env["VCPKG_DEFAULT_TRIPLET"];
         if (envVar) {
             return envVar;
         }
-        else {
-            if (this.isWin32()) {
-                return "x64-windows";
-            }
-            else if (this.isLinux()) {
-                return "x64-linux";
-            }
-            else if (this.isMacos()) {
-                return "x64-osx";
-            }
-            else if (this.isBSD()) {
-                return "x64-freebsd";
-            }
+        let arch = null;
+        // On hosted GitHub runners, the env var RUNNER_ARCH can be 'X86', 'X64', 'ARM' or 'ARM64'.
+        arch = (_b = (_a = process.env["RUNNER_ARCH"]) === null || _a === void 0 ? void 0 : _a.toLowerCase()) !== null && _b !== void 0 ? _b : null;
+        if (!arch) {
+            // Fallback to os.arch() when running outside of GH runners.
+            arch = os.arch();
         }
-        return null;
+        let plat = null;
+        if (this.isWin32()) {
+            plat = "windows";
+        }
+        else if (this.isLinux()) {
+            plat = "linux";
+        }
+        else if (this.isMacos()) {
+            plat = "osx";
+        }
+        else if (this.isBSD()) {
+            plat = "freebsd";
+        }
+        if (plat && arch)
+            return `${arch}-${plat}`;
+        else
+            return null;
     }
     // Set both the environment variable and the workflow variable with the same name.
     // The workflow variable might be re-used in subsequent steps.
diff --git a/package-lock.json b/package-lock.json
index 1ddb5a30..43482245 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,11 +15,11 @@
         "@actions/github": "6.0.0",
         "@actions/glob": "^0.4.0",
         "@actions/io": "^1.1.3",
-        "@lukka/action-lib": "^4.1.1",
-        "@lukka/assets-lib": "^4.1.1",
-        "@lukka/base-lib": "^4.1.1",
-        "@lukka/base-util-lib": "^4.1.1",
-        "@lukka/run-vcpkg-lib": "^4.1.1",
+        "@lukka/action-lib": "^4.1.2",
+        "@lukka/assets-lib": "^4.1.2",
+        "@lukka/base-lib": "^4.1.2",
+        "@lukka/base-util-lib": "^4.1.2",
+        "@lukka/run-vcpkg-lib": "^4.1.2",
         "@types/adm-zip": "^0.4.32",
         "@types/follow-redirects": "^1.14.1",
         "@types/jest": "29.5.6",
@@ -1434,9 +1434,9 @@
       }
     },
     "node_modules/@lukka/action-lib": {
-      "version": "4.1.1",
-      "resolved": "https://npm.pkg.github.com/download/@lukka/action-lib/4.1.1/78208274d33910aadd8eb982ebccc50da6083728",
-      "integrity": "sha512-HESUq0Io4PQqk1YAM/e/IZfVmTC/UC4Zh+V9aIdPQIFwL2ByKg8YbWLhxg3Sel4i9td5jcTTFuVQW3ZmNnnvXQ==",
+      "version": "4.1.2",
+      "resolved": "https://npm.pkg.github.com/download/@lukka/action-lib/4.1.2/fa9e5eacfa50a4a624e72e6f15bc510e3370b88b",
+      "integrity": "sha512-+V5GS6hyGFm3RHL34R+ns1MDlTfK+hylt7uyK+ZOqxhvHXvpzjxtbByI6reDScRqXRD5Ly42OjUD+Fu0GWAJaA==",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "1.10.1",
@@ -1444,29 +1444,29 @@
         "@actions/github": "^6.0.0",
         "@actions/glob": "0.4.0",
         "@actions/io": "1.1.3",
-        "@lukka/base-lib": "^4.1.1",
-        "@lukka/base-util-lib": "^4.1.1"
+        "@lukka/base-lib": "^4.1.2",
+        "@lukka/base-util-lib": "^4.1.2"
       }
     },
     "node_modules/@lukka/assets-lib": {
-      "version": "4.1.1",
-      "resolved": "https://npm.pkg.github.com/download/@lukka/assets-lib/4.1.1/ee5355030f35629c64fabe86ff06d0b66a6167f4",
-      "integrity": "sha512-ugB6Yc0ZmmnwNtewM0EvxGxSDEzJBtBfVaezBusil3u6ED1Yf6neK87s5lZi7o+smcJz0RZletbEB1mimZdQHQ==",
+      "version": "4.1.2",
+      "resolved": "https://npm.pkg.github.com/download/@lukka/assets-lib/4.1.2/8691cb9d6a6cbb135fc2293f32f039eb99ab124e",
+      "integrity": "sha512-2DND+cFwE0w0WS65hX9VTfLV4R2DAPoA7OtIZVnJNsprKqStattKseBYwgqqLSrNotmk+N48Eoa1RnmQFnKqww==",
       "license": "MIT"
     },
     "node_modules/@lukka/base-lib": {
-      "version": "4.1.1",
-      "resolved": "https://npm.pkg.github.com/download/@lukka/base-lib/4.1.1/c340a0779dbd0c23164115e5df335f4cacba7866",
-      "integrity": "sha512-jD83GvX4bve20gcXEVoWnNov9tc2NuLN/Zi+/u9194/WXf8Vqx8NLKFATSE1AtJUyG7cbvw2Fk2BiNb0Eig/tQ==",
+      "version": "4.1.2",
+      "resolved": "https://npm.pkg.github.com/download/@lukka/base-lib/4.1.2/70b0a14de47898cb8bb83603ce4bb55e2c5d9e3d",
+      "integrity": "sha512-qXIzaoLmdSudOP0pTNeHeDLM2KwnOLJs0B56fDHsjVfMZslNCd8QXac4bp9VHoxCYVY/WtJaj+nUNtYi+ldiQg==",
       "license": "MIT"
     },
     "node_modules/@lukka/base-util-lib": {
-      "version": "4.1.1",
-      "resolved": "https://npm.pkg.github.com/download/@lukka/base-util-lib/4.1.1/b683e40b74e4f18fe1327879f208df99332d294b",
-      "integrity": "sha512-USg9u99V+QqK2vw6wuzl0MyqP5oC0skBATvCMLh18masx/ghR6a8ATiWBCdcOjCYUl9xNKoVAlL/sALaHqMrfQ==",
+      "version": "4.1.2",
+      "resolved": "https://npm.pkg.github.com/download/@lukka/base-util-lib/4.1.2/876c167f067fecbc47b13ba20e5c6296c3379f97",
+      "integrity": "sha512-h6CCiFyXr2tkaTEwK5Uo3+9gHQhtllexUiBP3heK3aMbkeBC4C0gmoZA3uBl5bsMchIz/IZcyNqbwcR+4la7Zw==",
       "license": "MIT",
       "dependencies": {
-        "@lukka/base-lib": "^4.1.1",
+        "@lukka/base-lib": "^4.1.2",
         "del": "^5",
         "fast-glob": "^3.3.1",
         "using-statement": "^0.4.2"
@@ -1499,13 +1499,13 @@
       }
     },
     "node_modules/@lukka/run-vcpkg-lib": {
-      "version": "4.1.1",
-      "resolved": "https://npm.pkg.github.com/download/@lukka/run-vcpkg-lib/4.1.1/1093bc4a46f27214d1aa0ddd78325a563fe7aa0e",
-      "integrity": "sha512-rjZdqT4PEPYPPyJf139vKiTnxUOldC2Fkrpd40+JSLS5jwBLUHf3xJBOqZ/jeY8Sh1Xh6Lf1SAT1XtRWWx8tpg==",
+      "version": "4.1.2",
+      "resolved": "https://npm.pkg.github.com/download/@lukka/run-vcpkg-lib/4.1.2/425066fbe7c1e04d17c1441fe49bfbcd7cd77dd4",
+      "integrity": "sha512-rLETeYB/ublZw4yInFN/mmnBIfwmabZ6dCN+8Rsn40CDvf1DGUGViWi1ny1HyuUruGVghJsvURtpTZ3onR7b7g==",
       "license": "MIT",
       "dependencies": {
-        "@lukka/base-lib": "^4.1.1",
-        "@lukka/base-util-lib": "^4.1.1",
+        "@lukka/base-lib": "^4.1.2",
+        "@lukka/base-util-lib": "^4.1.2",
         "fast-glob": "^3.3.2",
         "jsonpath": "^1.1.1",
         "using-statement": "^0.4.2"
diff --git a/package.json b/package.json
index de0ce593..5f564fda 100644
--- a/package.json
+++ b/package.json
@@ -40,11 +40,11 @@
     "@actions/github": "6.0.0",
     "@actions/glob": "^0.4.0",
     "@actions/io": "^1.1.3",
-    "@lukka/action-lib": "^4.1.1",
-    "@lukka/assets-lib": "^4.1.1",
-    "@lukka/base-lib": "^4.1.1",
-    "@lukka/base-util-lib": "^4.1.1",
-    "@lukka/run-vcpkg-lib": "^4.1.1",
+    "@lukka/action-lib": "^4.1.2",
+    "@lukka/assets-lib": "^4.1.2",
+    "@lukka/base-lib": "^4.1.2",
+    "@lukka/base-util-lib": "^4.1.2",
+    "@lukka/run-vcpkg-lib": "^4.1.2",
     "@types/adm-zip": "^0.4.32",
     "@types/follow-redirects": "^1.14.1",
     "@types/jest": "29.5.6",