fix again

.appveyor.yml

@@ -31,7 +31,7 @@ image:
   # AppVeyor builds are ordered by the image list:
   - Visual Studio 2019
   - macos-monterey
-  - Ubuntu2004
+  - Ubuntu1804
   - Ubuntu2204
   - Visual Studio 2022
 
@@ -50,9 +50,9 @@ matrix:
       COMPILER: GCC
     - image: Visual Studio 2019
       COMPILER: MSVC
-    - image: Ubuntu2004
+    - image: Ubuntu1804
       COMPILER: MinGW
-    - image: Ubuntu2004
+    - image: Ubuntu1804
       COMPILER: MSVC
     - image: Ubuntu2204
       COMPILER: MinGW
@@ -65,7 +65,7 @@ matrix:
     - image: macos-monterey
       COMPILER: MSVC
     # Following builds are disabled to prevent build timeouts
-    - image: Ubuntu2004
+    - image: Ubuntu1804
       COMPILER: Clang
     - image: Ubuntu2204
       COMPILER: Clang
@@ -74,15 +74,15 @@ matrix:
     - image: Visual Studio 2022
       COMPILER: MSVC
     # Following builds are not supported by AppImage
-    - image: Ubuntu2004
+    - image: Ubuntu1804
       ARCH: arm64
 
 for:
   # Ubuntu (AppImage)
   -
     matrix:
       only:
-        - image: Ubuntu2004
+        - image: Ubuntu1804
 
     clone_folder: ~/mmapper
 
@@ -131,7 +131,7 @@ for:
 
     init:
       - sh: echo _NPROCESSORS_ONLN=$(getconf _NPROCESSORS_ONLN)
-      - sh: if [[ $ARCH == x64 ]]; then export DOCKER_IMAGE=multiarch/ubuntu-debootstrap:amd64-focal ; fi
+      - sh: if [[ $ARCH == x64 ]]; then export DOCKER_IMAGE=ubuntu:focal ; fi
       - sh: if [[ $ARCH == x64 ]]; then export TARGET_ARCHITECTURE=amd64 ; fi
       - sh: if [[ $ARCH == arm64 ]]; then export DOCKER_IMAGE=multiarch/debian-debootstrap:arm64-bookworm ; fi
       - sh: if [[ $ARCH == arm64 ]]; then export TARGET_ARCHITECTURE=arm64 ; fi