diff --git a/Build.ps1 b/Build.ps1
index c9db75f..9ea78f6 100644
--- a/Build.ps1
+++ b/Build.ps1
@@ -89,22 +89,37 @@ function Main {
         Write-Host "Building for $Version..."
         Build-FromSource $Version
     } else {
-        $latestTag = git tag --sort=-creatordate | Select-Object -First 1
-        $latestTagTime = [int](git log -1 $latestTag --format=%at 2>&1 | Where-Object { $_ -match '^\d+$' })
-
-        $currentBuildTime = if ($buildFiles = Get-ChildItem -Path "build/avante_html2md*" -ErrorAction SilentlyContinue) {
-            [long](($buildFiles | ForEach-Object { $_.LastWriteTime } |
-                Measure-Object -Maximum).Maximum.Subtract([datetime]'1970-01-01').TotalSeconds)
+        $latestTag = git describe --tags --abbrev=0 2>&1 | Where-Object { $_ -ne $null }
+        $builtTag = if (Test-Path "build/.tag") {
+            Get-Content "build/.tag"
         } else {
-            $latestTagTime
+            $null
         }
 
-        if ($latestTagTime -lt $currentBuildTime) {
-            Write-Host "Local build is up to date. No download needed."
-            return
+        function Save-Tag($tag) {
+            $tag | Set-Content "build/.tag"
+        }
+
+        if ($latestTag -eq $builtTag -and $latestTag) {
+            Write-Host "Local build is up to date. No download needed."
+        } elseif ($latestTag -ne $builtTag -and $latestTag) {
+            if (Test-Command "gh" -and Test-GHAuth) {
+                gh release download $latestTag --repo "github.com/$REPO_OWNER/$REPO_NAME" --pattern "*$ARTIFACT_NAME_PATTERN*" --clobber --output - | tar -zxvf - -C $TARGET_DIR
+                Save-Tag $latestTag
+            } else {
+                $ARTIFACT_URL = Invoke-RestMethod -Uri "https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/releases/tags/$latestTag" | Select-String -Pattern "browser_download_url" | ForEach-Object { $_.Matches.Groups[1].Value } | Where-Object { $_ -match $ARTIFACT_NAME_PATTERN }
+
+                Invoke-WebRequest -Uri $ARTIFACT_URL -OutFile "$TempFile"
+                Expand-Archive -Path "$TempFile" -DestinationPath "$TARGET_DIR" -Force
+                Remove-Item "$TempFile"
+                Save-Tag $latestTag
+            }
+        } else {
+            cargo build --release --features=$Version
+            Get-ChildItem -Path "target/release/avante_*.dll" | ForEach-Object {
+                Copy-Item $_.FullName "build/$($_.Name)"
+            }
         }
-        Write-Host "Downloading for $Version..."
-        Download-Prebuilt $Version
     }
     Write-Host "Completed!"
 }
diff --git a/build.sh b/build.sh
index 6e5c032..c537a2a 100644
--- a/build.sh
+++ b/build.sh
@@ -51,36 +51,48 @@ LUA_VERSION="${LUA_VERSION:-luajit}"
 ARTIFACT_NAME_PATTERN="avante_lib-$PLATFORM-$ARCH-$LUA_VERSION"
 
 test_command() {
-    command -v "$1" >/dev/null 2>&1
+  command -v "$1" >/dev/null 2>&1
 }
 
 test_gh_auth() {
-    if gh api user >/dev/null 2>&1; then
-        return 0
-    else
-        return 1
-    fi
+  if gh api user >/dev/null 2>&1; then
+    return 0
+  else
+    return 1
+  fi
 }
 
 if [ ! -d "$TARGET_DIR" ]; then
-    mkdir -p "$TARGET_DIR"
+  mkdir -p "$TARGET_DIR"
 fi
 
-latest_tag_time=$(git tag --sort=-creatordate | xargs git log -1 --format=%at)
-current_build_time=$(stat -c %Y build/avante_html2md* 2>/dev/null || echo "$latest_tag_time")
-if [[ "$latest_tag_time" -ge "$current_build_time" ]]; then
+latest_tag="$(git describe --tags --abbrev=0 || true)" # will be empty in clone repos
+built_tag="$(cat build/.tag 2>/dev/null || true)"
+
+save_tag() {
+  echo "$latest_tag" >build/.tag
+}
+
+if [[ "$latest_tag" = "$built_tag" && -n "$latest_tag" ]]; then
+  echo "Local build is up to date. No download needed."
+elif [[ "$latest_tag" != "$built_tag" && -n "$latest_tag" ]]; then
   if test_command "gh" && test_gh_auth; then
-    gh release download --repo "github.com/$REPO_OWNER/$REPO_NAME" --pattern "*$ARTIFACT_NAME_PATTERN*" --clobber --output - | tar -zxv -C "$TARGET_DIR"
+    gh release download "$latest_tag" --repo "github.com/$REPO_OWNER/$REPO_NAME" --pattern "*$ARTIFACT_NAME_PATTERN*" --clobber --output - | tar -zxv -C "$TARGET_DIR"
+    save_tag
   else
     # Get the artifact download URL
-    ARTIFACT_URL=$(curl -s "https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/releases/latest" | grep "browser_download_url" | cut -d '"' -f 4 | grep $ARTIFACT_NAME_PATTERN)
+    ARTIFACT_URL=$(curl -s "https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/releases/tags/$latest_tag" | grep "browser_download_url" | cut -d '"' -f 4 | grep $ARTIFACT_NAME_PATTERN)
 
     set -x
 
     mkdir -p "$TARGET_DIR"
 
     curl -L "$ARTIFACT_URL" | tar -zxv -C "$TARGET_DIR"
+    save_tag
   fi
 else
-  echo "Local build is up to date. No download needed."
+  cargo build --release --features=$LUA_VERSION
+  for f in target/release/lib*.so; do
+    cp "$f" "build/$(echo $f | sed 's#.*/lib##')"
+  done
 fi