diff --git a/ansible/playbooks/README.md b/ansible/playbooks/README.md
index 73ddbb8d..fca3f106 100644
--- a/ansible/playbooks/README.md
+++ b/ansible/playbooks/README.md
@@ -55,6 +55,14 @@ Before running the playbook, make sure the following settings are correct, and o
 | reframe_venv | Path where a virtual environment will be created for the ReFrame installation |
 | symlinks_to_host | List of paths that should get a symlink to the corresponding host path |
 
+### Reproducibility settings
+| Variable | Description |
+| --- | --- |
+| prefix_reprod_dir | Name of subdirectory for storing reproducibility information |
+| prefix_packages_file | Filename for storing list of installed packages |
+| prefix_metadata_json | Filename for storing metadata of build |
+
+
 ### Logging
 | Variable | Description |
 | --- | --- |
diff --git a/ansible/playbooks/roles/compatibility_layer/defaults/main.yml b/ansible/playbooks/roles/compatibility_layer/defaults/main.yml
index 4a0ccaac..7a6ec0ed 100644
--- a/ansible/playbooks/roles/compatibility_layer/defaults/main.yml
+++ b/ansible/playbooks/roles/compatibility_layer/defaults/main.yml
@@ -41,6 +41,11 @@ prefix_install: >-
     {{ prefix_use_builtin_bootstrap | ternary('/usr/local/bin/bootstrap-prefix.sh', prefix_custom_bootstrap_script.remote) }}
     {{ prefix_source_options }}
 
+# Reproducibility settings
+prefix_reprod_dir: reprod
+prefix_packages_file: packages.txt
+prefix_metadata_json: build.json
+
 # Logging
 eessi_log_dir: "/tmp/eessi-logs"
 prefix_build_log: "{{ eessi_log_dir }}/prefix-build.log"
diff --git a/ansible/playbooks/roles/compatibility_layer/tasks/main.yml b/ansible/playbooks/roles/compatibility_layer/tasks/main.yml
index 341cbb57..7a45863a 100644
--- a/ansible/playbooks/roles/compatibility_layer/tasks/main.yml
+++ b/ansible/playbooks/roles/compatibility_layer/tasks/main.yml
@@ -46,3 +46,8 @@
   ansible.builtin.include_tasks: test.yml
   tags:
     - test
+
+- name: Save reproducibility information for this build
+  ansible.builtin.include_tasks: reprod.yml
+  tags:
+    - reprod
diff --git a/ansible/playbooks/roles/compatibility_layer/tasks/reprod.yml b/ansible/playbooks/roles/compatibility_layer/tasks/reprod.yml
new file mode 100644
index 00000000..36931898
--- /dev/null
+++ b/ansible/playbooks/roles/compatibility_layer/tasks/reprod.yml
@@ -0,0 +1,52 @@
+# Store some information and scripts that were used for this installation.
+---
+
+- name: Make a subdirectory for storing build information
+  ansible.builtin.file:
+    path: "{{ gentoo_prefix_path }}/{{ prefix_reprod_dir }}"
+    state: directory
+    mode: '0755'
+  tags:
+    - reprod
+
+- name: Copy the used bootstrap script
+  ansible.builtin.copy:
+    src: "{{ prefix_use_builtin_bootstrap | ternary('/usr/local/bin/bootstrap-prefix.sh', prefix_custom_bootstrap_script.remote) }}"
+    dest: "{{ gentoo_prefix_path }}/{{ prefix_reprod_dir }}/bootstrap-prefix.sh"
+    mode: '0644'
+  tags:
+    - reprod
+
+- name: Get list of installed packages
+  ansible.builtin.command: "qlist -IRv"
+  changed_when: false
+  register: qlist
+  tags:
+    - reprod
+
+- name: Dump list of installed packages to a file
+  ansible.builtin.copy:
+    content: "{{ qlist.stdout }}"
+    dest: "{{ gentoo_prefix_path }}/{{ prefix_reprod_dir }}/{{ prefix_packages_file }}"
+    mode: '0644'
+  tags:
+    - reprod
+
+- name: Store other metadata of build in a json file
+  ansible.builtin.copy:
+    content: "{{ metadata | to_nice_json }}"
+    dest: "{{ gentoo_prefix_path }}/{{ prefix_reprod_dir }}/{{ prefix_metadata_json }}"
+    mode: '0644'
+  vars:
+    metadata:
+      username: "{{ ansible_user_id }}"
+      userid: "{{ ansible_user_uid }}"
+      timestamp: "{{ ansible_date_time.iso8601 }}"
+      hostname: "{{ ansible_hostname }}"
+      host_os: "{{ ansible_distribution }} {{ ansible_distribution_version }}"
+      host_kernel: "{{ ansible_kernel }}"
+      host_memory: "{{ ansible_memory_mb.real }}"
+      host_mounts: "{{ ansible_mounts }}"
+      gentoo_git_commit: "{{ gentoo_git_commit }}"
+  tags:
+    - reprod