diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 0b31c7a..5975b84 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,7 +7,7 @@ build:
   jobs:
     pre_install:
       - curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
-      - source ~/.cargo/env
+      - . ~/.cargo/env
 
 sphinx:
    configuration: docs/conf.py