diff --git a/Jenkinsfile b/Jenkinsfile
index eef3483..09890ca 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -44,7 +44,7 @@ pipeline {
                                 'archlinux-latest'
                     }
                     axis {
-                        name 'ARCH'
+                        name 'LABEL_ARCH'
                         values 'arm64', 'amd64'
                     }
                     axis {
@@ -60,7 +60,7 @@ pipeline {
                 }
                 stages {
                     stage('Run Multiarch Image') {
-                        agent { label "linux && ${ARCH}" }
+                        agent { label "linux && ${LABEL_ARCH}" }
                         steps {
                             withCredentials([string(
                                     credentialsId: 'DOCKER_REGISTRY',
diff --git a/lib/build.sh b/lib/build.sh
index e5f92c8..9062e9f 100644
--- a/lib/build.sh
+++ b/lib/build.sh
@@ -329,6 +329,7 @@ build() {
 
 	set_compile_opts || return 1
 	# check if we need to install with sudo
+	test -d "${PREFIX}" || mkdir -p "${PREFIX}"
 	unset SUDO_MODIFY
 	testfile="${PREFIX}/ffmpeg-build-testfile"
 	if touch "${testfile}" 2>/dev/null; then
@@ -338,7 +339,6 @@ build() {
 		${SUDO_MODIFY} mkdir -p "${PREFIX}/bin/" || return 1
 	fi
 	test -f "${testfile}" && ${SUDO_MODIFY} rm "${testfile}"
-	test -d "${PREFIX}" && ${SUDO_MODIFY} rm -rf "${PREFIX}"
 	test -d "${PREFIX}/bin/" || { ${SUDO_MODIFY} mkdir -p "${PREFIX}/bin/" || return 1; }
 
 	# embed this project's enables/versions