diff --git a/conf.py b/conf.py
index 3bd96297f..d4c4682e9 100644
--- a/conf.py
+++ b/conf.py
@@ -213,7 +213,15 @@ def setup(sphinx):
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
-exclude_patterns = ["_build", "_spack_root", "view", "._view", "common/*", ".venv"]
+exclude_patterns = [
+    "_build",
+    "_spack_root",
+    "view",
+    "._view",
+    ".spack-env",
+    "common/*",
+    ".venv",
+]
 
 # The reST default role (used for this markup: `text`) to use for all documents.
 # default_role = None
diff --git a/requirements.txt b/requirements.txt
index 8a4fd91bf..5db37ae5f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,6 @@ sphinx_design==0.7.0
 sphinx-last-updated-by-git==0.3.8
 sphinx-sitemap==2.9.0
 furo==2025.12.19
-python-levenshtein==0.27.5
 docutils==0.22.4
 pygments==2.21.0
 urllib3==2.8.0
diff --git a/spack.yaml b/spack.yaml
index 91648f9fd..054a29870 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -1,14 +1,12 @@
 spack:
   specs:
-  - py-sphinx@5
-  - py-sphinxcontrib-programoutput
-  - py-sphinx-rtd-theme
+  - py-sphinx@9
+  - py-docutils
+  - py-pygments
+  - py-furo
   - py-sphinx-copybutton
-  - py-python-levenshtein
-  # Newer py-docutils messes up the style?
-  - py-docutils@0.16
-  # Our hacky way to register styles only works on old pygments
-  - py-pygments@2.12
+  - py-sphinx-last-updated-by-git
+  - py-sphinx-sitemap
   - graphviz
   - py-codespell
   view: true