Index: build/jenkins/pipelines/docker-differential.Jenkinsfile
===================================================================
--- build/jenkins/pipelines/docker-differential.Jenkinsfile
+++ build/jenkins/pipelines/docker-differential.Jenkinsfile
@@ -19,9 +19,26 @@
 
 def compilers = ["gcc6"]
 
+
+def updatesMap = compilers.collectEntries {
+	["${it}": svnUpdate(it)]
+}
+
+// docker-svn may fail, so update svn just in case.
+def svnUpdate(compiler) {
+	return {
+		stage("Update: ${compiler}") {
+			ws("/zpool0/${compiler}") {
+				sh "svn up"
+			}
+		}
+	}
+}
+
 def patchesMap = compilers.collectEntries {
 	["${it}": patch(it)]
 }
+
 def patch(compiler) {
 	return {
 		stage("Patch: ${compiler}") {
@@ -109,6 +126,11 @@
 	}
 
 	stages {
+		stage("Update") {
+			steps {
+				script { parallel updatesMap }
+			}
+		}
 		stage("Patch") {
 			steps {
 				sh "arc patch --diff ${params.DIFF_ID} --force"
Index: build/jenkins/pipelines/docker-svn.Jenkinsfile
===================================================================
--- build/jenkins/pipelines/docker-svn.Jenkinsfile
+++ build/jenkins/pipelines/docker-svn.Jenkinsfile
@@ -67,7 +67,7 @@
 					}
 				}
 
-				sh "sudo zfs destroy zpool0/${compiler}@latest"
+				sh "sudo zfs destroy zpool0/${compiler}@latest || true"
 				sh "sudo zfs snapshot zpool0/${compiler}@latest"
 			} catch (e) {
 				sh "sudo zfs rollback zpool0/${compiler}@latest"
@@ -121,7 +121,7 @@
 					sh "sudo zfs rollback zpool0/trunk@latest"
 				}
 				success {
-					sh "sudo zfs destroy -R zpool0/trunk@latest"
+					sh "sudo zfs destroy -R zpool0/trunk@latest || true"
 					sh "sudo zfs snapshot zpool0/trunk@latest"
 				}
 			}