diff --git a/_webi/installers.js b/_webi/installers.js
index c822d9a..35b222a 100644
--- a/_webi/installers.js
+++ b/_webi/installers.js
@@ -93,7 +93,7 @@ Installers.renderBash = async function (
     ['WEBI_GIT_TAG', rel.git_tag], // TODO replace with branch
     ['WEBI_LTS', rel.lts],
     ['WEBI_CHANNEL', rel.channel],
-    ['WEBI_EXT', rel.ext.replace(/tar.*/, 'tar')],
+    ['WEBI_EXT', rel.ext],
     ['WEBI_FORMATS', formats.join(',')],
     ['WEBI_PKG_URL', rel.download],
     ['WEBI_PKG_PATHNAME', pkgFile],
diff --git a/_webi/package-install.tpl.sh b/_webi/package-install.tpl.sh
index 4571d05..c933559 100644
--- a/_webi/package-install.tpl.sh
+++ b/_webi/package-install.tpl.sh
@@ -197,20 +197,32 @@ __bootstrap_webi() {
         my_dl_rel="$(
             fn_sub_home "${WEBI_PKG_PATH}/${WEBI_PKG_FILE}"
         )"
-        if [ "tar" = "$WEBI_EXT" ]; then
+        if test "$WEBI_EXT" = "tar.zst"; then
+            echo "    Extracting $(t_path "${my_dl_rel}")"
+            unzstd -c --keep "${WEBI_PKG_PATH}/$WEBI_PKG_FILE" | tar xf -
+        elif test "$WEBI_EXT" = "tar.xz"; then
+            echo "    Extracting $(t_path "${my_dl_rel}")"
+            unxz -c --keep "${WEBI_PKG_PATH}/$WEBI_PKG_FILE" | tar xf -
+        elif test "$WEBI_EXT" = "tar.gz"; then
+            echo "    Extracting $(t_path "${my_dl_rel}")"
+            tar xzf "${WEBI_PKG_PATH}/$WEBI_PKG_FILE"
+        elif test "$WEBI_EXT" = "tar.bz2"; then
+            echo "    Extracting $(t_path "${my_dl_rel}")"
+            tar xjf "${WEBI_PKG_PATH}/$WEBI_PKG_FILE"
+        elif test "$WEBI_EXT" = "tar"; then
             echo "    Extracting $(t_path "${my_dl_rel}")"
             tar xf "${WEBI_PKG_PATH}/$WEBI_PKG_FILE"
-        elif [ "zip" = "$WEBI_EXT" ] || [ "app.zip" = "$WEBI_EXT" ]; then
+        elif test "$WEBI_EXT" = "zip" || test "$WEBI_EXT" = "app.zip"; then
             echo "    Extracting $(t_path "${my_dl_rel}")"
             unzip "${WEBI_PKG_PATH}/$WEBI_PKG_FILE" > __unzip__.log
-        elif [ "exe" = "$WEBI_EXT" ]; then
+        elif test "$WEBI_EXT" = "exe"; then
             echo "    Moving $(t_path "${my_dl_rel}")"
             echo "      to $(t_path "$(fn_sub_home "$(pwd)")")"
             mv "${WEBI_PKG_PATH}/$WEBI_PKG_FILE" .
-        elif [ "git" = "$WEBI_EXT" ]; then
+        elif test "$WEBI_EXT" = "git"; then
             echo "    Moving $(t_path "${my_dl_rel}")"
             mv "${WEBI_PKG_PATH}/$WEBI_PKG_FILE" .
-        elif [ "xz" = "$WEBI_EXT" ]; then
+        elif test "$WEBI_EXT" = "xz"; then
             echo "    Inflating $(t_path "${my_dl_rel}")"
             unxz -c "${WEBI_PKG_PATH}/$WEBI_PKG_FILE" > "$(basename "$WEBI_PKG_FILE")"
         else