diff --git a/Docker/Dockerfile b/Docker/Dockerfile
index e2850d1..2411b23 100644
--- a/Docker/Dockerfile
+++ b/Docker/Dockerfile
@@ -25,6 +25,19 @@ RUN apt-get update && \
     apt-get install -y lsb-release wget software-properties-common gnupg && \
     bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)"
 
+# Remove any system HDF5 installations to prevent CMake from finding them
+RUN apt-get remove -y libhdf5-* hdf5-* || true && \
+    apt-get autoremove -y && \
+    rm -rf /usr/lib/x86_64-linux-gnu/libhdf5* \
+           /usr/lib/x86_64-linux-gnu/hdf5 \
+           /usr/lib/aarch64-linux-gnu/libhdf5* \
+           /usr/lib/aarch64-linux-gnu/hdf5 \
+           /usr/lib/libhdf5* \
+           /usr/include/hdf5* \
+           /usr/share/hdf5* \
+           /usr/local/lib/libhdf5* \
+           /usr/local/include/hdf5* || true
+
 # Apply our patches to spack
 RUN . /opt/setup_spack.sh && \
     REPOPATH=${SPACK_ROOT}/var/luxe-spack && \
diff --git a/packages/lxelsim/package.py b/packages/lxelsim/package.py
index ccf369c..5420bb1 100644
--- a/packages/lxelsim/package.py
+++ b/packages/lxelsim/package.py
@@ -8,7 +8,7 @@ class Lxelsim(CMakePackage, Key4hepPackage):
     git      = "https://github.com/LUXEsoftware/lxelsim.git"
     url      = "https://github.com/LUXEsoftware/lxelsim/archive/refs/tags/v00-01.tar.gz"
 
-    maintainers = ['']
+    maintainers = ['madbaron']
 
     version('master',  branch='master')
 
@@ -18,7 +18,10 @@ class Lxelsim(CMakePackage, Key4hepPackage):
     depends_on('hdf5')
 
     def cmake_args(self):
-        args = []  
+        args = []
         args.append(self.define('CMAKE_CXX_STANDARD', '20'))
-        #args.append(self.define('BUILD_TESTING', self.run_tests))
+
+        # Set HDF5_ROOT to prevent CMake from picking up system HDF5
+        args.append(self.define('HDF5_ROOT', self.spec['hdf5'].prefix))
+
         return args