diff --git a/build-docs.sh b/build-docs.sh
index 3eb4b749a..2838e6419 100644
--- a/build-docs.sh
+++ b/build-docs.sh
@@ -1,4 +1,4 @@
-export PYTHONPATH="$PYTHONPATH:$(pwd)/src"
+export PYTHONPATH="$(python build_scripts/pythonpath.py)"
 rm -rf docs/build
 rm -rf docs/jupyter_execute
 jupyter-book config sphinx docs/
diff --git a/build_scripts/pythonpath.py b/build_scripts/pythonpath.py
new file mode 100644
index 000000000..3b1dd1246
--- /dev/null
+++ b/build_scripts/pythonpath.py
@@ -0,0 +1,5 @@
+import os
+
+SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
+
+print(os.environ["PYTHONPATH"] + os.pathsep + os.path.abspath(os.path.join(SCRIPT_DIR, "..", "src")))