diff --git a/ct/calibre-web.sh b/ct/calibre-web.sh
index 278dd9ff8..63a5c1221 100644
--- a/ct/calibre-web.sh
+++ b/ct/calibre-web.sh
@@ -43,7 +43,12 @@ function update_script() {
 
     msg_info "Installing Dependencies"
     cd /opt/calibre-web
-    $STD uv sync --no-dev
+    if ! $STD uv sync --no-dev; then
+      msg_info "Retrying dependency install without build isolation"
+      $STD uv venv
+      $STD uv pip install --python /opt/calibre-web/.venv/bin/python --no-cache-dir calibreweb
+      $STD uv sync --no-dev --no-build-isolation
+    fi
     msg_ok "Installed Dependencies"
 
     msg_info "Restoring Data"
diff --git a/install/calibre-web-install.sh b/install/calibre-web-install.sh
index dc201423c..566e50069 100644
--- a/install/calibre-web-install.sh
+++ b/install/calibre-web-install.sh
@@ -32,7 +32,12 @@ setup_uv
 
 msg_info "Installing Python Dependencies"
 cd /opt/calibre-web
-$STD uv sync --no-dev
+if ! $STD uv sync --no-dev; then
+  msg_info "Retrying Python dependency install without build isolation"
+  $STD uv venv
+  $STD uv pip install --python /opt/calibre-web/.venv/bin/python --no-cache-dir calibreweb
+  $STD uv sync --no-dev --no-build-isolation
+fi
 msg_ok "Installed Python Dependencies"
 
 msg_info "Creating Service"