diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 99585a5b..408fb7fc 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -22,3 +22,4 @@ python:
       path: .
       extra_requirements:
         - docs
+    - requirements: extra-build-requirements.txt
diff --git a/extra-build-requirements.txt b/extra-build-requirements.txt
new file mode 100644
index 00000000..c40423dd
--- /dev/null
+++ b/extra-build-requirements.txt
@@ -0,0 +1 @@
+myst-nb @ git+https://github.com/executablebooks/MyST-NB.git
diff --git a/pyproject.toml b/pyproject.toml
index acd99b1b..44779ea0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,8 +49,7 @@ docs = [
   "sphinx-book-theme > 1.0",
   "sphinx-autodoc2",
   "sphinx",
-  # Use the nightly version of MyST-NB, https://github.com/executablebooks/MyST-NB/pull/600
-  "myst-nb @ git+https://github.com/executablebooks/MyST-NB.git",
+  # Use the nightly version of MyST-NB (in extra-build-requirements.txt), https://github.com/executablebooks/MyST-NB/pull/600
   "nbsphinx",
   "myst-parser[linkify]",
   "sphinx_copybutton",