Try building with yarn in hubs build

Jenkinsfile

+import groovy.json.JsonOutput
+
+// From https://issues.jenkins-ci.org/browse/JENKINS-44231
+
+// Given arbitrary string returns a strongly escaped shell string literal.
+// I.e. it will be in single quotes which turns off interpolation of $(...), etc.
+// E.g.: 1'2\3\'4 5"6 (groovy string) -> '1'\''2\3\'\''4 5"6' (groovy string which can be safely pasted into shell command).
+def shellString(s) {
+  // Replace ' with '\'' (https://unix.stackexchange.com/a/187654/260156). Then enclose with '...'.
+  // 1) Why not replace \ with \\? Because '...' does not treat backslashes in a special way.
+  // 2) And why not use ANSI-C quoting? I.e. we could replace ' with \'
+  // and enclose using $'...' (https://stackoverflow.com/a/8254156/4839573).
+  // Because ANSI-C quoting is not yet supported by Dash (default shell in Ubuntu & Debian) (https://unix.stackexchange.com/a/371873).
+  '\'' + s.replace('\'', '\'\\\'\'') + '\''
+}
+
 pipeline {
   agent any
 
@@ -6,9 +22,20 @@ pipeline {
   }
 
   stages {
+    stage('pre-build') {
+      steps {
+        checkout scm: [$class: 'GitSCM', clean: false, clearWorkspace: false]
+
+        sh 'rm -rf ./build ./tmp'
+      }
+    }
+
     stage('build') {
       steps {
-        build 'reticulum'
+        script {
+          def baseAssetsPath = "https://assets-dev.reticium.io/"
+          sh "GENERATE_SMOKE_TEST=true BASE_ASSETS_PATH=${shellString(baseAssetsPath)} yarn build -- --output-path build"
+        }
       }
     }
   }