Add back debian bullseye and add dh-make to ubuntu too

.circleci/config.yml

@@ -283,6 +283,7 @@ commands:
           command: >
             apt-get update && apt-get install -y
             build-essential
+            dh-make
             ssh
             git
             make
@@ -405,6 +406,15 @@ jobs:
       - cmake
       - build_deb
 
+  build_debian_bullseye:
+    docker:
+      - image: debian:bullseye
+    steps:
+      - install_debian_dependencies
+      - checkout
+      - cmake
+      - build_deb
+
 
   build_ubuntu_bionic:
     docker:
@@ -474,6 +484,10 @@ workflows:
           filters:
             tags:
               only: /.*/
+      - build_debian_bullseye:
+          filters:
+            tags:
+              only: /.*/
 
 
       - build_ubuntu_bionic: