diff -Nru codetree-1.2.0/debian/bzr-builder.manifest codetree-1.2.0/debian/bzr-builder.manifest
--- codetree-1.2.0/debian/bzr-builder.manifest	2021-02-05 09:20:19.000000000 +0000
+++ codetree-1.2.0/debian/bzr-builder.manifest	2021-02-09 09:16:39.000000000 +0000
@@ -1,2 +1,2 @@
-# bzr-builder format 0.3 deb-version {debupstream}-14~122
-lp:codetree revid:mergebot@juju-139df4-prod-is-toolbox-0.canonical.com-20210205091411-oktm3hf7m2jb8156
+# bzr-builder format 0.3 deb-version {debupstream}-14~123
+lp:codetree revid:mergebot@juju-139df4-prod-is-toolbox-0.canonical.com-20210209090429-y4odnqasdh5of05e
diff -Nru codetree-1.2.0/debian/changelog codetree-1.2.0/debian/changelog
--- codetree-1.2.0/debian/changelog	2021-02-05 09:20:19.000000000 +0000
+++ codetree-1.2.0/debian/changelog	2021-02-09 09:16:39.000000000 +0000
@@ -1,8 +1,8 @@
-codetree (1.2.0-14~122~ubuntu18.04.1) bionic; urgency=low
+codetree (1.2.0-14~123~ubuntu18.04.1) bionic; urgency=low
 
   * Auto build.
 
- -- Launchpad Package Builder <noreply@launchpad.net>  Fri, 05 Feb 2021 09:20:19 +0000
+ -- Launchpad Package Builder <noreply@launchpad.net>  Tue, 09 Feb 2021 09:16:39 +0000
 
 codetree (1.2.0-0) trusty; urgency=medium
 
diff -Nru codetree-1.2.0/snapcraft.yaml codetree-1.2.0/snapcraft.yaml
--- codetree-1.2.0/snapcraft.yaml	2021-02-05 09:20:18.000000000 +0000
+++ codetree-1.2.0/snapcraft.yaml	2021-02-09 09:16:38.000000000 +0000
@@ -3,12 +3,16 @@
 description: A tool for collating and building trees of files from various sources.
 # Switch to strict once https://bugs.launchpad.net/snappy/+bug/1657021
 # is addressed.
+base: core20
 confinement: classic
 adopt-info: codetree
 grade: stable
 apps:
   codetree:
-    command: bin/codetree
+    command: bin/python3 $SNAP/bin/codetree
+    environment:
+      PATH: $PATH:$SNAP/usr/bin
+      PYTHONPATH: $SNAP/lib/python3.8/site-packages
     # Classic mode has no plugs.
     # plugs:
     #   - home
@@ -17,8 +21,13 @@
 parts:
   codetree:
     plugin: python
-    python-version: python3
+    python-packages:
+      - pip
+      - setuptools
+      - wheel
     source: .
+    build-packages:
+      - bzr
     stage-packages:
       - bzr
       - git