Auto merge of #29983 - tbu-:pr_env_windows_hidden_variables, r=alexcrichton
Auto merge of #29983 - tbu-:pr_env_windows_hidden_variables, r=alexcrichton

Fixes #29972.

GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,graydon/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,aidancully/rust,graydon/rust,GBGamer/rust,aidancully/rust,aidancully/rust