diff --git a/flake.nix b/flake.nix
index 880e0db1a..b1935a297 100644
--- a/flake.nix
+++ b/flake.nix
@@ -604,14 +604,15 @@
             # Read "Ok" line when remote successfully locked
             read LOCK_OK
 
+            export ARTIQ_ROOT=`python -c "import artiq; print(artiq.__path__[0])"`/examples/kc705_nist_clock
+            export ARTIQ_LOW_LATENCY=1
+
             artiq_rtiomap --device-db $ARTIQ_ROOT/device_db.py device_map.bin
             artiq_mkfs -s ip `python -c "import artiq.examples.kc705_nist_clock.device_db as ddb; print(ddb.core_addr)"`/24 -f device_map device_map.bin kc705_nist_clock.config
             artiq_flash -t kc705 -H rpi-1 storage -f kc705_nist_clock.config
             artiq_flash -t kc705 -H rpi-1 -d ${packages.x86_64-linux.artiq-board-kc705-nist_clock}
             sleep 30
 
-            export ARTIQ_ROOT=`python -c "import artiq; print(artiq.__path__[0])"`/examples/kc705_nist_clock
-            export ARTIQ_LOW_LATENCY=1
             python -m unittest discover -v artiq.test.coredevice
           )