diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 4c58e28..41e4ac9 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -13,10 +13,9 @@ build:
   # custom build process
   # https://docs.readthedocs.io/en/stable/build-customization.html#install-dependencies-with-uv
   commands:
+    # dependencies
+    - mamba install -c conda-forge mystmd
     # build
     - myst build --html
     # deploy
     - mv _build/html $READTHEDOCS_OUTPUT/html
-
-conda:
-  environment: conda.yml
diff --git a/conda.yml b/conda.yml
deleted file mode 100644
index 63faf5c..0000000
--- a/conda.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-name: readthedocs
-
-channels:
-  - conda-forge
-  - nodefaults
-
-dependencies:
-  - python
-  - mystmd