Disclaimer: This guide is for informational purposes only. Installing NSP files requires a hacked Switch with custom firmware. Piracy harms developers. Only install dumps of games you legally own.
If the game asks for a “Software Update” but you already installed the NSP, you may need to disable “System Update Check” in Tinfoil’s settings or update your Switch’s firmware to the latest compatible version (typically 17.0.0+ for 2024 releases). SteamWorld Build Switch NSP -Update- -eShop-