A software installation package includes encrypted source code. An installer receives an encryption key for decrypting the encrypted source code. The installer further causes the establishment of a temporary virtual machine. The encrypted source code is decrypted, using the encryption key, on the temporary virtual machine. A compiler executing on the temporary virtual machine compiles the source code into an application. The application is transferred from the temporary virtual machine to an operating environment. The temporary virtual machine is then destroyed, thereby also destroying any decrypted copies of the source code.