diff --git a/.gitignore b/.gitignore
index 8ee54e8..9f860c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,3 +28,4 @@ coverage
 *.sw?
 
 *.tsbuildinfo
+*~
diff --git a/tasks.py b/tasks.py
index a33596f..d6b57ab 100644
--- a/tasks.py
+++ b/tasks.py
@@ -24,7 +24,7 @@ def release(c):
         version = js['version']
 
     # build the app, create zip archive
-    c.run('npm run build')
+    c.run("bash -lc 'nvm use lts/iron; npm run build'")
     os.chdir('dist')
     filename = f'myweather-{version}.zip'
     c.run(f'zip --recurse-paths {filename} *')