diff --git a/changelog.d/added/comment-flake-envrc.md b/changelog.d/added/comment-flake-envrc.md
new file mode 100644
index 000000000..1efc46cbf
--- /dev/null
+++ b/changelog.d/added/comment-flake-envrc.md
@@ -0,0 +1,2 @@
+- Added `.envrc` (Python) and `.flake.lock` (uncommentable) as recognised file
+  types for comments. (#1061)
diff --git a/src/reuse/comment.py b/src/reuse/comment.py
index ac2e415f5..9d4872657 100644
--- a/src/reuse/comment.py
+++ b/src/reuse/comment.py
@@ -853,6 +853,7 @@ class XQueryCommentStyle(CommentStyle):
     ".dockerignore": PythonCommentStyle,
     ".earthlyignore": PythonCommentStyle,
     ".editorconfig": PythonCommentStyle,
+    ".envrc": PythonCommentStyle,
     ".empty": EmptyCommentStyle,
     ".eslintignore": PythonCommentStyle,
     ".eslintrc": UncommentableCommentStyle,
@@ -885,6 +886,7 @@ class XQueryCommentStyle(CommentStyle):
     "Dockerfile": PythonCommentStyle,
     "Doxyfile": PythonCommentStyle,
     "Earthfile": PythonCommentStyle,
+    "flake.lock": UncommentableCommentStyle,  # is a JSON file
     "Gemfile": PythonCommentStyle,
     "go.mod": CppCommentStyle,
     "go.sum": UncommentableCommentStyle,