diff --git a/Dockerfile b/Dockerfile
index dc4a844..7771900 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG DEBIAN_VERSION=11
+ARG DEBIAN_VERSION=12
 FROM "mcr.microsoft.com/devcontainers/base:debian-$DEBIAN_VERSION"
 
 # Install dependencies.
@@ -84,6 +84,5 @@ RUN \
   if test -n "$HLS_VERSION"; then \
     ghcup install hls "$HLS_VERSION" --set; \
     ghcup gc --hls-no-ghc --tmpdirs; \
-    rm --force --recursive --verbose "$CABAL_STORE/*" ~/.cabal/{logs,packages,store}; \
     haskell-language-server-wrapper --version; \
   fi
diff --git a/README.markdown b/README.markdown
index 4165f87..a73b4cd 100644
--- a/README.markdown
+++ b/README.markdown
@@ -5,5 +5,5 @@ This Docker image provides a Haskell development environment with the following
 - [GHCup](https://www.haskell.org/ghcup/)
 - [GHC](https://www.haskell.org/ghc/)
 - [Cabal](https://www.haskell.org/cabal/)
-- [Stack](https://docs.haskellstack.org/en/stable/README/)
+- [Stack](https://docs.haskellstack.org/en/stable/)
 - [HLS](https://haskell-language-server.readthedocs.io/en/latest/)