Cannot start debuuger on QNX

The debugger fails to start with the following message box:

The stderr log outputs

Unexpected GDB stderr: "QNX environment is not set!\n"

Even though I have explicitly sourced the QNX environment prior to launching QtCreator. It appears that QtCreator is neither inheriting the calling shell environment nor managing to source the SDP environment itself. This causes the QNX GDB to fail with the aforementioned message.