diff --git a/data/0.15.0/github-cache.json b/data/0.15.0/github-cache.json
index 66d5284..6a52a8b 100644
--- a/data/0.15.0/github-cache.json
+++ b/data/0.15.0/github-cache.json
@@ -261,8 +261,59 @@
     "assetsUrl": "https://api.github.com/repos/ninja-build/ninja/releases/155357494/assets"
   },
   "githubApiCache-3-0": [
+    "v1.5.1-0",
     "v2.0.0-0"
   ],
+  "githubApiCache-3-1-v1.5.1-0": {
+    "assets": [
+      {
+        "id": 184737292,
+        "name": "openocd-0.12.0+dev-aarch64-lin.tar.gz",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/openocd-0.12.0%2Bdev-aarch64-lin.tar.gz"
+      },
+      {
+        "id": 184736619,
+        "name": "openocd-0.12.0+dev-arm64-mac.zip",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/openocd-0.12.0%2Bdev-arm64-mac.zip"
+      },
+      {
+        "id": 184739207,
+        "name": "openocd-0.12.0+dev-x64-win.zip",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/openocd-0.12.0%2Bdev-x64-win.zip"
+      },
+      {
+        "id": 184736698,
+        "name": "openocd-0.12.0+dev-x86_64-lin.tar.gz",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/openocd-0.12.0%2Bdev-x86_64-lin.tar.gz"
+      },
+      {
+        "id": 184739206,
+        "name": "pico-sdk-tools-1.5.1-x64-win.zip",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/pico-sdk-tools-1.5.1-x64-win.zip"
+      },
+      {
+        "id": 184737290,
+        "name": "picotool-2.0.0-aarch64-lin.tar.gz",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/picotool-2.0.0-aarch64-lin.tar.gz"
+      },
+      {
+        "id": 184736618,
+        "name": "picotool-2.0.0-mac.zip",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/picotool-2.0.0-mac.zip"
+      },
+      {
+        "id": 184739208,
+        "name": "picotool-2.0.0-x64-win.zip",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/picotool-2.0.0-x64-win.zip"
+      },
+      {
+        "id": 184736697,
+        "name": "picotool-2.0.0-x86_64-lin.tar.gz",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v1.5.1-0/picotool-2.0.0-x86_64-lin.tar.gz"
+      }
+    ],
+    "assetsUrl": "https://api.github.com/repos/raspberrypi/pico-sdk-tools/releases/169373034/assets"
+  },
   "githubApiCache-3-1-v2.0.0-0": {
     "assets": [
       {
@@ -324,6 +375,11 @@
         "id": 184709988,
         "name": "picotool-2.0.0-x86_64-lin.tar.gz",
         "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v2.0.0-0/picotool-2.0.0-x86_64-lin.tar.gz"
+      },
+      {
+        "id": 184716562,
+        "name": "riscv-toolchain-14-aarch64-lin.tar.gz",
+        "browser_download_url": "https://github.com/raspberrypi/pico-sdk-tools/releases/download/v2.0.0-0/riscv-toolchain-14-aarch64-lin.tar.gz"
       }
     ],
     "assetsUrl": "https://api.github.com/repos/raspberrypi/pico-sdk-tools/releases/169351844/assets"
diff --git a/scripts/genCache.py b/scripts/genCache.py
index 55d5f5a..b93afb0 100644
--- a/scripts/genCache.py
+++ b/scripts/genCache.py
@@ -50,7 +50,7 @@
     ["1.5.1", "2.0.0"],
     ["v3.28.6", "v3.29.6"],
     ["v1.12.1"],
-    ["v2.0.0-0"],
+    ["v1.5.1-0", "v2.0.0-0"],
 ]
 
 headers = {
diff --git a/src/utils/download.mts b/src/utils/download.mts
index cb1f749..c71950c 100644
--- a/src/utils/download.mts
+++ b/src/utils/download.mts
@@ -46,7 +46,7 @@ const TOOLS_PLATFORMS: { [key: string]: string } = {
 /// Release tags for the sdk tools
 const TOOLS_RELEASES: { [key: string]: string } = {
   // eslint-disable-next-line @typescript-eslint/naming-convention
-  "1.5.1": "v1.5.1-1",
+  "1.5.1": "v1.5.1-0",
   // eslint-disable-next-line @typescript-eslint/naming-convention
   "2.0.0": "v2.0.0-0",
 };
@@ -531,6 +531,13 @@ async function downloadAndInstallGithubAsset(
 export async function downloadAndInstallTools(
   version: string
 ): Promise<boolean> {
+  if (parseInt(version.split('.')[0]) < 2) {
+    if (process.platform !== "win32") {
+      Logger.log(`Skipping tools install not on Windows for pre-2.0.0 SDK.`);
+
+      return true;
+    }
+  }
   const assetExt: string = process.platform === "linux" ? "tar.gz" : "zip";
   const targetDirectory = buildToolsPath(version);
   const archiveFileName = `sdk-tools.${assetExt}`;