diff --git a/scripts/install.ps1 b/scripts/install.ps1
index 8a9895a0686..7a354ec542b 100644
--- a/scripts/install.ps1
+++ b/scripts/install.ps1
@@ -1262,6 +1262,7 @@ function Install-OpenClawFromGit {
     $prevPnpmWorkspaceConcurrency = $env:PNPM_CONFIG_WORKSPACE_CONCURRENCY
     $prevPnpmVerifyDepsBeforeRun = $env:PNPM_CONFIG_VERIFY_DEPS_BEFORE_RUN
     $prevPnpmSideEffectsCache = $env:PNPM_CONFIG_SIDE_EFFECTS_CACHE
+    $prevNodeLlamaPostinstall = $env:NODE_LLAMA_CPP_POSTINSTALL
     $prevNodeOptions = $env:NODE_OPTIONS
     $pnpmCommand = Get-PnpmCommandPath
     if (-not $pnpmCommand) {
@@ -1273,6 +1274,7 @@ function Install-OpenClawFromGit {
     $env:PNPM_CONFIG_WORKSPACE_CONCURRENCY = "1"
     $env:PNPM_CONFIG_VERIFY_DEPS_BEFORE_RUN = "false"
     $env:PNPM_CONFIG_SIDE_EFFECTS_CACHE = "false"
+    $env:NODE_LLAMA_CPP_POSTINSTALL = "skip"
     $pushedRepoLocation = $false
     try {
         Push-Location -LiteralPath $RepoDir
@@ -1320,6 +1322,7 @@ function Install-OpenClawFromGit {
         $env:PNPM_CONFIG_WORKSPACE_CONCURRENCY = $prevPnpmWorkspaceConcurrency
         $env:PNPM_CONFIG_VERIFY_DEPS_BEFORE_RUN = $prevPnpmVerifyDepsBeforeRun
         $env:PNPM_CONFIG_SIDE_EFFECTS_CACHE = $prevPnpmSideEffectsCache
+        $env:NODE_LLAMA_CPP_POSTINSTALL = $prevNodeLlamaPostinstall
         $env:NODE_OPTIONS = $prevNodeOptions
     }
 
diff --git a/test/scripts/install-ps1.test.ts b/test/scripts/install-ps1.test.ts
index 37905e7d9d5..188547e71d6 100644
--- a/test/scripts/install-ps1.test.ts
+++ b/test/scripts/install-ps1.test.ts
@@ -363,6 +363,7 @@ describe("install.ps1 failure handling", () => {
     expect(gitInstallBody).toContain('$env:PNPM_CONFIG_WORKSPACE_CONCURRENCY = "1"');
     expect(gitInstallBody).toContain('$env:PNPM_CONFIG_VERIFY_DEPS_BEFORE_RUN = "false"');
     expect(gitInstallBody).toContain('$env:PNPM_CONFIG_SIDE_EFFECTS_CACHE = "false"');
+    expect(gitInstallBody).toContain('$env:NODE_LLAMA_CPP_POSTINSTALL = "skip"');
     expect(gitInstallBody).toContain("$installSucceeded = ($LASTEXITCODE -eq 0)");
     expect(gitInstallBody).toContain("clearing node_modules and retrying once");
     expect(gitInstallBody).toContain("Remove-Item -Recurse -Force node_modules");
@@ -382,6 +383,7 @@ describe("install.ps1 failure handling", () => {
     expect(gitInstallBody).toContain(
       "$env:PNPM_CONFIG_WORKSPACE_CONCURRENCY = $prevPnpmWorkspaceConcurrency",
     );
+    expect(gitInstallBody).toContain("$env:NODE_LLAMA_CPP_POSTINSTALL = $prevNodeLlamaPostinstall");
     expect(gitInstallBody).toContain("Add-ToUserPath $binDir");
     expect(gitInstallBody).toContain('Write-Host "[!] pnpm build failed for the Git checkout"');
     expect(gitInstallBody).toContain('$entryPath = Join-Path $RepoDir "dist\\\\entry.js"');