diff --git a/_config.yml b/_config.yml
index a92a8de..adedfa0 100644
--- a/_config.yml
+++ b/_config.yml
@@ -53,14 +53,14 @@ sphinx:
       figure: "Figure %s"
     numfig_secnum_depth: 2
     mathjax_path: https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
-    # Allow copy buttons in SWISH query boxes
+    # Configure Sphinx-copybutton
     # <https://sphinx-copybutton.readthedocs.io/en/latest/>
-    # NOTE: it is disabled for now since it overwrites the code block id
-    # <https://github.com/executablebooks/sphinx-copybutton/issues/115>
-    # copybutton_selector: "div.highlight pre, div.extract.swish pre.swish.query"
-    copybutton_prompt_text: "?-"
+    copybutton_prompt_text: "\\s*\\?\\s*-\\s*"
+    copybutton_prompt_is_regexp: true
     copybutton_only_copy_prompt_lines: false
     copybutton_remove_prompts: true
+    # copybutton_selector: "div.highlight pre, div.extract.swish pre.swish.query"
+    # Configure SL-Sphinx <https://github.com/simply-logical/SL-Sphinx>
     sl_exercise_directory: /src/ex/
     sl_code_directory: /src/code/
     sl_swish_url: https://swish.simply-logical.space/
diff --git a/_ext b/_ext
index c8246be..6a92061 160000
--- a/_ext
+++ b/_ext
@@ -1 +1 @@
-Subproject commit c8246beb4c457ebbdc08977f951cc3b8bf3acd69
+Subproject commit 6a92061bb3bec1dc9659b655d90126acaba318a0
diff --git a/_static/lpn.css b/_static/lpn.css
index 1b85bf4..d32182d 100644
--- a/_static/lpn.css
+++ b/_static/lpn.css
@@ -34,11 +34,12 @@ pre.query, pre.source, pre.verbatim {
   outline: 1px dotted green;
 }
 
-div.query {
-  position: relative;
-  width: 80%;
-  display: inline-block;
-}
+/* div.query {
+ *   position: relative;
+ *   width: 80%;
+ *   display: inline-block;
+ * }
+ */
 
 div.open-prolog {
   width: auto;
@@ -55,7 +56,8 @@ div.open-prolog div.load {
   right: -37px;
 }
 
-div.source.swish, div.query.swish {
+/* div.query.swish, */
+div.source.swish {
   padding: 8px 8px;
 }