diff --git a/containers/jug/setup_detectors.py b/containers/jug/setup_detectors.py
index 931c1a7598abee9495481fde9b508574fd44ad9f..20c9c84034bdb32457da4e4e0224402ed9abf55b 100755
--- a/containers/jug/setup_detectors.py
+++ b/containers/jug/setup_detectors.py
@@ -24,7 +24,7 @@ export JUGGLER_BEAMLINE_CONFIG_VERSION=$BEAMLINE_CONFIG_VERSION
 export JUGGLER_INSTALL_PREFIX=/usr/local
 
 ## Export detector libraries
-export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:{prefix}/lib
+export LD_LIBRARY_PATH={prefix}/lib${{LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}}
 
 ## modify PS1 for this detector version
 export PS1="${{PS1:-}}"
@@ -40,7 +40,7 @@ export DETECTOR_CONFIG={detector}
 export DETECTOR_VERSION={version}
 
 ## Export detector libraries
-export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:{prefix}/lib
+export LD_LIBRARY_PATH={prefix}/lib${{LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}}
 
 ## modify PS1 for this detector version
 export PS1="${{PS1:-}}"