diff --git a/installers/charm/prometheus/charmcraft.yaml b/installers/charm/prometheus/charmcraft.yaml
new file mode 100644
index 0000000..0a285a9
--- /dev/null
+++ b/installers/charm/prometheus/charmcraft.yaml
@@ -0,0 +1,37 @@
+# Copyright 2021 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# For those usages not covered by the Apache License, Version 2.0 please
+# contact: legal@canonical.com
+#
+# To get in touch with the maintainers, please contact:
+# osm-charmers@lists.launchpad.net
+##
+
+type: charm
+bases:
+  - build-on:
+      - name: ubuntu
+        channel: "20.04"
+        architectures: ["amd64"]
+    run-on:
+      - name: ubuntu
+        channel: "20.04"
+        architectures:
+          - amd64
+          - aarch64
+          - arm64
+parts:
+  charm:
+    build-packages: [git]
diff --git a/installers/charm/prometheus/tox.ini b/installers/charm/prometheus/tox.ini
index 30e0ea8..c341c8e 100644
--- a/installers/charm/prometheus/tox.ini
+++ b/installers/charm/prometheus/tox.ini
@@ -95,19 +95,22 @@
 #######################################################################################
 [testenv:build]
 passenv=HTTP_PROXY HTTPS_PROXY NO_PROXY
-deps = charmcraft
 whitelist_externals =
   charmcraft
-  cp
+  sh
 commands =
   charmcraft build
-  cp -r build release
+  sh -c 'ubuntu_version=20.04; \
+        architectures="amd64-aarch64-arm64"; \
+        charm_name=`cat metadata.yaml | grep -E "^name: " | cut -f 2 -d " "`; \
+        mv $charm_name"_ubuntu-"$ubuntu_version-$architectures.charm $charm_name.charm'
 
 #######################################################################################
 [flake8]
 ignore =
         W291,
         W293,
+        W503,
         E123,
         E125,
         E226,