fix pixi path

app.py

@@ -12,7 +12,7 @@ def check_and_install_pixi():
         subprocess.check_call("curl -fsSL https://pixi.sh/install.sh | bash", shell=True)
 
 def pixi_run():
-    command = "pixi run app"
+    command = f"{PIXI_PATH} run app"
     subprocess.check_call(command, shell=True)
 
 if __name__ == "__main__":