ci(builds.sr.ht): do some additional fixes on both config and build script

Signed-off-by: Andrei Jiroh Halili <ajhalili2006@andreijiroh.eu.org>

.build.yml

@@ -2,8 +2,10 @@ image: alpine/edge
 environment: 
   FF_ENABLE_COMMIT_DATA: "true"
   FF_GENERATE_SOCIAL_CARDS: "true"
+  SKIP_VENV_SETUP: "true"
 packages:
   - openssh-client
+  - rsync
   - python3
   - py3-pip
   - py3-wheel
@@ -28,8 +30,12 @@ tasks:
   - repo-sync: |
       cd web
   - build: |
-      sudo rm /usr/lib/python3*/EXTERNALLY_MANAGED -rfv || true
-      cd tildeweb && pip3 install -r requirements.txt --user
+      # https://www.jeffgeerling.com/blog/2023/how-solve-error-externally-managed-environment-when-installing-pip3
+      sudo rm /usr/lib/python3*/EXTERNALLY-MANAGED -rfv
+
+      cd web
+
+      # our build script handles both the install and build stuff itself
       export PATH="$PATH:$HOME/.local/bin"
       bash ./build.sh
   - generate-archive: |