diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c80fa315..a5b5ba9c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,6 @@
 name: CI
 
+# by not building all branches on push, we avoid the duplicated builds in PRs
 on:
   push:
     branches:
diff --git a/.github/workflows/deploy-ghcr.yml b/.github/workflows/deploy-ghcr.yml
index dc2990dc..059dd3f5 100644
--- a/.github/workflows/deploy-ghcr.yml
+++ b/.github/workflows/deploy-ghcr.yml
@@ -59,7 +59,10 @@ jobs:
         # Assign the release tag to container on release
         if: github.event_name == 'release'
         run: |
-          apptainer push ${{ env.container }}.sif oras://${{ env.registry }}/${{ github.repository }}:${{ github.ref_name }}
+          fullversionname=${{ github.ref_name }}
+          # Remove the leading "v" character  
+          versionname=${fullversionname:1}
+          apptainer push ${{ env.container }}.sif oras://${{ env.registry }}/${{ github.repository }}:${versionname}
 
       - name: Deploy ${{ env.container }} container ${{ matrix.deffiles[1] }}
         # Otherwise, the container tag is "latest" by default.
diff --git a/pyproject.toml b/pyproject.toml
index a4449d58..fabb1c81 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,6 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "nectarchain"
 description = "Analysis chain for the CTA MSTN NectarCAM prototype"
+readme = "README.md"
 authors = [{name = "NectarCAM collaboration"}]
 license = {text = "BSD-3-Clause"}
 classifiers = [
@@ -27,24 +28,28 @@ dependencies = [
     "zodb",
     "zeo",
 ]
-dynamic = ["version"]
 
-[project.readme]
-file = "README.md"
-content-type = "text/markdown; charset=UTF-8"
+# needed for setuptools_scm, we don't define a static version
+dynamic = ["version"]
 
 [project.urls]
 "Bug Tracker" = "https://github.com/cta-observatory/nectarchain/issues"
 "Source Code" = "https://github.com/cta-observatory/nectarchain"
 
 [project.optional-dependencies]
-tests = ["pytest"]
-dev = ["setuptools_scm"]
-all = [
+test = [
     "pytest",
+    "pytest-cov",
+]
+dev = [
     "setuptools_scm",
 ]
 
+# we can use self-references to simplify all
+all = [
+    "nectarchain[test,dev]",
+]
+
 [tool.setuptools.packages.find]
 where = ["src"]
 exclude = ["nectarchain._dev_version"]