diff --git a/build-scripts/assemble.sh b/build-scripts/assemble.sh
index 8d052c252d2fe..50c60d8185135 100644
--- a/build-scripts/assemble.sh
+++ b/build-scripts/assemble.sh
@@ -159,8 +159,8 @@ function parse_args() {
 # ====
 function add_configuration_files() {
     # Add our settings to the configuration files
-    cat "$PATH_CONF/security/roles.wazuh.yml" >> "$PATH_CONF/opensearch-security/roles.yml"
-    cat "$PATH_CONF/security/roles_mapping.wazuh.yml" >> "$PATH_CONF/opensearch-security/roles_mapping.yml"
+    cat "$PATH_CONF/security/roles.wazuh.yml" >>"$PATH_CONF/opensearch-security/roles.yml"
+    cat "$PATH_CONF/security/roles_mapping.wazuh.yml" >>"$PATH_CONF/opensearch-security/roles_mapping.yml"
 
     cp "$PATH_CONF/opensearch.prod.yml" "$PATH_CONF/opensearch.yml"
 
@@ -188,9 +188,16 @@ function add_wazuh_tools() {
     local download_url
     download_url="https://packages-dev.wazuh.com/${version}"
 
-    curl -sL "${download_url}/config.yml" -o "$PATH_PLUGINS/opensearch-security/tools/config.yml"
-    curl -sL "${download_url}/wazuh-passwords-tool.sh" -o "$PATH_PLUGINS/opensearch-security/tools/wazuh-passwords-tool.sh"
-    curl -sL "${download_url}/wazuh-certs-tool.sh" -o "$PATH_PLUGINS/opensearch-security/tools/wazuh-certs-tool.sh"
+    curl -sL "${download_url}/config.yml" -o "$PATH_PLUGINS"/opensearch-security/tools/config.yml
+    curl -sL "${download_url}/wazuh-passwords-tool.sh" -o "$PATH_PLUGINS"/opensearch-security/tools/wazuh-passwords-tool.sh
+    curl -sL "${download_url}/wazuh-certs-tool.sh" -o "$PATH_PLUGINS"/opensearch-security/tools/wazuh-certs-tool.sh
+}
+
+# ====
+# Add demo certificates installer
+# ====
+function add_demo_certs_installer() {
+    cp install-demo-certificates.sh "$PATH_PLUGINS"/opensearch-security/tools/
 }
 
 # ====
@@ -282,6 +289,7 @@ function assemble_tar() {
     # Install plugins
     install_plugins "${version}"
     fix_log_rotation "${PATH_CONF}"
+    add_demo_certs_installer
     # Swap configuration files
     add_configuration_files
     remove_unneeded_files
@@ -322,6 +330,7 @@ function assemble_rpm() {
     install_plugins "${version}"
     fix_log_rotation ${PATH_CONF}
     enable_performance_analyzer_rca ${src_path}
+    add_demo_certs_installer
     # Swap configuration files
     add_configuration_files
     remove_unneeded_files
@@ -366,8 +375,16 @@ function assemble_deb() {
 
     # Extract min-package. Creates usr/, etc/ and var/ in the current directory
     echo "Extract ${ARTIFACT_BUILD_NAME} archive"
+    # Extracts code
     ar xf "${ARTIFACT_BUILD_NAME}" data.tar.gz
     tar zvxf data.tar.gz
+    # Extracts debian control files (preinst, postrm, ...)
+    # We need to use some custom files, otherwise debuild fails
+    mv "./debian/control" "./debian/wazuh-control"
+    ar xf "${ARTIFACT_BUILD_NAME}" control.tar.gz
+    tar zvxf control.tar.gz -C "debian"
+    mv "./debian/wazuh-control" "./debian/control"
+    rm "./debian/conffiles"
 
     local version
     version=$(cat ./usr/share/wazuh-indexer/VERSION)
@@ -376,6 +393,7 @@ function assemble_deb() {
     install_plugins "${version}"
     fix_log_rotation ${PATH_CONF}
     enable_performance_analyzer_rca ${src_path}
+    add_demo_certs_installer
     # Swap configuration files
     add_configuration_files
     remove_unneeded_files
@@ -421,6 +439,8 @@ function main() {
     TMP_DIR="${OUTPUT}/tmp/${TARGET}"
     mkdir -p "$TMP_DIR"
     cp "${OUTPUT}/dist/$ARTIFACT_BUILD_NAME" "${TMP_DIR}"
+    # Copy the demo certificates generator
+    cp distribution/packages/src/common/scripts/install-demo-certificates.sh "$TMP_DIR"
 
     case $PACKAGE in
     tar)