different method

build-signal.jenkins

@@ -42,10 +42,11 @@ podTemplate(
                         [
                             $class: "CloneOption",
                             shallow: true,
+                            depth: 1
                         ],
                         [
                             $class: "CheckoutOption",
-                            timeout: 2,
+                            timeout: 2
                         ],
                     ],
                 ])
@@ -57,13 +58,13 @@ podTemplate(
                 writeFile(file: workspace + "/test-chamber-13.lan.root.crt", text: functions.getCurrentRootCA())
                 sh """
                     git config --global --add safe.directory '*'
-                    rm -f /usr/local/bin/yarn /usr/local/bin/yarnpkg
-                    npm install --global yarn
+                    apt-get update -yqq && apt-get full-upgrade -yqq
+                    apt-get install -yqq curl wget git jq git-lfs
                     cd ${workspace}/signal-desktop
-                    sed 's/\\"build:electron\\"\\:\\s\\"electron-builder/\\"build:electron\\"\\: \\"electron-builder --linux AppImage/' -i package.json
-                    yarn install --frozen-lockfile
-                    yarn generate
-                    yarn build
+                    cat package.json | jq '.build.linux += {target:["AppImage"]}' > with_appimage_package.json
+                    mv with_appimage_package.json package.json
+                    yarn install
+                    yarn build-release
                 """
 
                 outputFile = sh (