diff --git a/Jenkinsfile b/Jenkinsfile
index 11ece57..b12a5ed 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -4,6 +4,7 @@ pipeline {
             label 'docker-x86_64'
             filename 'Dockerfile.jenkins'
             args '--user=root --privileged -v /var/run/docker.sock:/var/run/docker.sock'
+            reuseNode true
         }
     }
 
diff --git a/Makefile b/Makefile
index af1a32f..6a59d98 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,4 @@
+.SILENT:
 SCHEME=chibi
 DOCKER_TAG=head
 RNRS=r7rs
@@ -12,9 +13,9 @@ SFX=sps
 LIB_PATHS=-I .akku/lib
 endif
 VERSION != cat retropikzel/${LIBRARY}/VERSION
-PACKAGE_ARGS != cat retropikzel/${LIBRARY}/PACKAGE_ARGS || echo ""
-CSC_OPTIONS != cat retropikzel/${LIBRARY}/CSC_OPTIONS || echo ""
-APT_PACKAGES != cat retropikzel/${LIBRARY}/APT_PACKAGES || echo ""
+PACKAGE_ARGS != cat retropikzel/${LIBRARY}/PACKAGE_ARGS 2> /dev/null || echo ""
+CSC_OPTIONS != cat retropikzel/${LIBRARY}/CSC_OPTIONS 2> /dev/null || echo ""
+APT_PACKAGES != cat retropikzel/${LIBRARY}/APT_PACKAGES 2> /dev/null || echo ""
 
 LIBRARY_FILE=retropikzel/${LIBRARY}.sld
 DESCRIPTION != head -n1 retropikzel/${LIBRARY}/README.md