diff --git a/.forgejo/workflows/main.yaml b/.forgejo/workflows/main.yaml
index cf63bfa..780827a 100644
--- a/.forgejo/workflows/main.yaml
+++ b/.forgejo/workflows/main.yaml
@@ -1,7 +1,7 @@
 on: [push]
 jobs:
 
-  archlinux:
+  archlinux_latest:
     container:
       image: ${{vars.DOCKER}}archlinux:base-20240818.0.255804
     steps:
@@ -14,8 +14,22 @@ jobs:
     - run: spcd-build-project
     - run: spcd-browse-workspace
 
-  alpine:
-    needs: archlinux
+  archlinux_previous:
+    needs: archlinux_latest
+    container:
+      image: ${{vars.DOCKER}}archlinux:base-20240101.0.204074
+    steps:
+    - name: spcd
+      env:
+        SPCD: ${{vars.SPCD}}
+      run: ${{vars.SPCD}}
+
+    - run: spcd-check-project
+    - run: spcd-build-project
+    - run: spcd-browse-workspace
+
+  alpine_latest:
+    needs: archlinux_previous
     container:
       image: ${{vars.DOCKER}}alpine:3.20
     steps:
@@ -28,8 +42,8 @@ jobs:
     - run: spcd-build-project
     - run: spcd-browse-workspace
 
-  fedora:
-    needs: alpine
+  fedora_latest:
+    needs: alpine_latest
     container:
       image: ${{vars.DOCKER}}fedora:40
     steps:
@@ -42,8 +56,8 @@ jobs:
     - run: spcd-build-project
     - run: spcd-browse-workspace
 
-  debian:
-    needs: fedora
+  debian_latest:
+    needs: fedora_latest
     container:
       image: ${{vars.DOCKER}}debian:bookworm
     steps:
@@ -59,8 +73,8 @@ jobs:
     - run: spcd-browse-workspace
     - run: spcd-synchronize
 
-  opensuse:
-    needs: debian
+  opensuse_latest:
+    needs: debian_latest
     container:
       image: ${{vars.DOCKER}}opensuse/leap:15.6
     steps:
@@ -73,8 +87,8 @@ jobs:
     - run: spcd-build-project
     - run: spcd-browse-workspace
 
-  ubuntu:
-    needs: opensuse
+  ubuntu_latest:
+    needs: opensuse_latest
     container:
       image: ${{vars.DOCKER}}ubuntu:noble
     steps:
@@ -87,8 +101,8 @@ jobs:
     - run: spcd-build-project
     - run: spcd-browse-workspace
 
-  almalinux:
-    needs: ubuntu
+  almalinux_latest:
+    needs: ubuntu_latest
     container:
       image: ${{vars.DOCKER}}almalinux:9
     steps:
@@ -101,8 +115,8 @@ jobs:
     - run: spcd-build-project
     - run: spcd-browse-workspace
 
-  rockylinux:
-    needs: almalinux
+  rockylinux_latest:
+    needs: almalinux_latest
     container:
       image: ${{vars.DOCKER}}rockylinux:9
     steps:
@@ -114,3 +128,101 @@ jobs:
     - run: spcd-check-project
     - run: spcd-build-project
     - run: spcd-browse-workspace
+
+  alpine_previous:
+    needs: rockylinux_latest
+    container:
+      image: ${{vars.DOCKER}}alpine:3.19
+    steps:
+    - name: spcd
+      env:
+        SPCD: ${{vars.SPCD}}
+      run: ${{vars.SPCD}}
+
+    - run: spcd-check-project
+    - run: spcd-build-project
+    - run: spcd-browse-workspace
+
+  fedora_previous:
+    needs: alpine_previous
+    container:
+      image: ${{vars.DOCKER}}fedora:39
+    steps:
+    - name: spcd
+      env:
+        SPCD: ${{vars.SPCD}}
+      run: ${{vars.SPCD}}
+
+    - run: spcd-check-project
+    - run: spcd-build-project
+    - run: spcd-browse-workspace
+
+  opensuse_previous:
+    needs: fedora_previous
+    container:
+      image: ${{vars.DOCKER}}opensuse/leap:15.5
+    steps:
+    - name: spcd
+      env:
+        SPCD: ${{vars.SPCD}}
+      run: ${{vars.SPCD}}
+
+    - run: spcd-check-project
+    - run: spcd-build-project
+    - run: spcd-browse-workspace
+
+  almalinux_previous:
+    needs: opensuse_previous
+    container:
+      image: ${{vars.DOCKER}}almalinux:8
+    steps:
+    - name: spcd
+      env:
+        SPCD: ${{vars.SPCD}}
+      run: ${{vars.SPCD}}
+
+    - run: spcd-check-project
+    - run: spcd-build-project
+    - run: spcd-browse-workspace
+
+  rockylinux_previous:
+    needs: almalinux_previous
+    container:
+      image: ${{vars.DOCKER}}rockylinux:8
+    steps:
+    - name: spcd
+      env:
+        SPCD: ${{vars.SPCD}}
+      run: ${{vars.SPCD}}
+
+    - run: spcd-check-project
+    - run: spcd-build-project
+    - run: spcd-browse-workspace
+
+  ubuntu_previous:
+    needs: rockylinux_previous
+    container:
+      image: ${{vars.DOCKER}}ubuntu:jammy
+    steps:
+    - name: spcd
+      env:
+        SPCD: ${{vars.SPCD}}
+      run: ${{vars.SPCD}}
+
+    - run: spcd-check-project
+    - run: spcd-build-project
+    - run: spcd-browse-workspace
+
+  debian_previous:
+    needs: ubuntu_previous
+    container:
+      image: ${{vars.DOCKER}}debian:bullseye
+    steps:
+    - name: spcd
+      env:
+        SPCD: ${{vars.SPCD}}
+      run: ${{vars.SPCD}}
+
+    - run: spcd-check-project
+    - run: spcd-build-project
+    - run: spcd-browse-workspace
diff --git a/.forgejo/workflows/previous.yaml b/.forgejo/workflows/previous.yaml
deleted file mode 100644
index 92bbcb8..0000000
--- a/.forgejo/workflows/previous.yaml
+++ /dev/null
@@ -1,113 +0,0 @@
-on: [push]
-jobs:
-
-  archlinux:
-    container:
-      image: ${{vars.DOCKER}}archlinux:base-20240101.0.204074
-    steps:
-    - name: spcd
-      env:
-        SPCD: ${{vars.SPCD}}
-      run: ${{vars.SPCD}}
-
-    - run: spcd-check-project
-    - run: spcd-build-project
-    - run: spcd-browse-workspace
-
-  alpine:
-    needs: archlinux
-    container:
-      image: ${{vars.DOCKER}}alpine:3.19
-    steps:
-    - name: spcd
-      env:
-        SPCD: ${{vars.SPCD}}
-      run: ${{vars.SPCD}}
-
-    - run: spcd-check-project
-    - run: spcd-build-project
-    - run: spcd-browse-workspace
-
-  fedora:
-    needs: alpine
-    container:
-      image: ${{vars.DOCKER}}fedora:39
-    steps:
-    - name: spcd
-      env:
-        SPCD: ${{vars.SPCD}}
-      run: ${{vars.SPCD}}
-
-    - run: spcd-check-project
-    - run: spcd-build-project
-    - run: spcd-browse-workspace
-
-  opensuse:
-    needs: fedora
-    container:
-      image: ${{vars.DOCKER}}opensuse/leap:15.5
-    steps:
-    - name: spcd
-      env:
-        SPCD: ${{vars.SPCD}}
-      run: ${{vars.SPCD}}
-
-    - run: spcd-check-project
-    - run: spcd-build-project
-    - run: spcd-browse-workspace
-
-  almalinux:
-    needs: opensuse
-    container:
-      image: ${{vars.DOCKER}}almalinux:8
-    steps:
-    - name: spcd
-      env:
-        SPCD: ${{vars.SPCD}}
-      run: ${{vars.SPCD}}
-
-    - run: spcd-check-project
-    - run: spcd-build-project
-    - run: spcd-browse-workspace
-
-  rockylinux:
-    needs: almalinux
-    container:
-      image: ${{vars.DOCKER}}rockylinux:8
-    steps:
-    - name: spcd
-      env:
-        SPCD: ${{vars.SPCD}}
-      run: ${{vars.SPCD}}
-
-    - run: spcd-check-project
-    - run: spcd-build-project
-    - run: spcd-browse-workspace
-
-  ubuntu:
-    needs: rockylinux
-    container:
-      image: ${{vars.DOCKER}}ubuntu:jammy
-    steps:
-    - name: spcd
-      env:
-        SPCD: ${{vars.SPCD}}
-      run: ${{vars.SPCD}}
-
-    - run: spcd-check-project
-    - run: spcd-build-project
-    - run: spcd-browse-workspace
-
-  debian:
-    needs: ubuntu
-    container:
-      image: ${{vars.DOCKER}}debian:bullseye
-    steps:
-    - name: spcd
-      env:
-        SPCD: ${{vars.SPCD}}
-      run: ${{vars.SPCD}}
-
-    - run: spcd-check-project
-    - run: spcd-build-project
-    - run: spcd-browse-workspace
diff --git a/readme.md b/readme.md
index 559e788..e9702d4 100644
--- a/readme.md
+++ b/readme.md
@@ -211,6 +211,8 @@ Handle project workflows in a unified way:
 
 ## When
 
+* sequential workflows
+
 ### Shell
 
 * comment
diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index b58e1cf..0e1ce38 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -18,7 +18,7 @@
 [ -n "${SPCD_REF_STAGING}" ] || SPCD_REF_STAGING="dev"
 
 [ -n "${SPCD_URL_ALPINE}" ] ||
-    SPCD_URL_ALPINE="https://dl-cdn.alpinelinux.org/alpine"
+    SPCD_URL_ALPINE="https://dl-cdn.alpinelinux.org"
 [ -n "${SPCD_URL_ARCH}" ] ||
     SPCD_URL_ARCH="https://geo.mirror.pkgbuild.com"
 [ -n "${SPCD_URL_DEBIAN}" ] ||