diff --git a/ci/docker/build_deps_spack.Dockerfile b/ci/docker/build_deps_spack.Dockerfile
index d0f4a7a7aa..7bd50c6739 100644
--- a/ci/docker/build_deps_spack.Dockerfile
+++ b/ci/docker/build_deps_spack.Dockerfile
@@ -60,13 +60,6 @@ RUN spack compiler find
 # Find all external packages
 RUN spack external find --all --not-buildable
 
-# Enable Spack build cache
-ARG SPACK_BUILD_CACHE
-ENV SPACK_BUILD_CACHE="${SPACK_BUILD_CACHE:-develop-2025-05-18}"
-RUN spack mirror add ${SPACK_BUILD_CACHE} https://binaries.spack.io/${SPACK_BUILD_CACHE} && \
-    spack buildcache keys --install --trust --force && \
-    spack mirror remove ${SPACK_BUILD_CACHE}
-
 # Copy Spack configuration and build recipes
 ARG CP2K_VERSION
 ENV CP2K_VERSION=${CP2K_VERSION:-ssmp}
diff --git a/tools/docker/Dockerfile.test_spack b/tools/docker/Dockerfile.test_spack
index 8f5766df88..a4795cf034 100644
--- a/tools/docker/Dockerfile.test_spack
+++ b/tools/docker/Dockerfile.test_spack
@@ -57,11 +57,6 @@ RUN spack compiler find
 # Find all external packages
 RUN spack external find --all --not-buildable
 
-# Add public Spack cache from https://cache.spack.io
-RUN spack mirror add ${SPACK_VERSION}-cache https://binaries.spack.io/${SPACK_VERSION} && \
-    spack buildcache keys --install --trust --force && \
-    spack mirror remove ${SPACK_VERSION}-cache
-
 # Add local Spack cache.
 ARG SPACK_CACHE
 ENV SPACK_CACHE=${SPACK_CACHE:-"s3://spack-cache --s3-endpoint-url=http://localhost:9000"}
diff --git a/tools/docker/generate_dockerfiles.py b/tools/docker/generate_dockerfiles.py
index e155f0b31c..5f274ffacd 100755
--- a/tools/docker/generate_dockerfiles.py
+++ b/tools/docker/generate_dockerfiles.py
@@ -883,11 +883,6 @@ RUN spack compiler find
 # Find all external packages
 RUN spack external find --all --not-buildable
 
-# Add public Spack cache from https://cache.spack.io
-RUN spack mirror add ${{SPACK_VERSION}}-cache https://binaries.spack.io/${{SPACK_VERSION}} && \
-    spack buildcache keys --install --trust --force && \
-    spack mirror remove ${{SPACK_VERSION}}-cache
-
 # Add local Spack cache.
 ARG SPACK_CACHE
 ENV SPACK_CACHE=${{SPACK_CACHE:-"s3://spack-cache --s3-endpoint-url=http://localhost:9000"}}