diff --git a/hosts/yodaHedgehog/host-specific.nix b/hosts/yodaHedgehog/host-specific.nix
index a86e085..7f6e889 100644
--- a/hosts/yodaHedgehog/host-specific.nix
+++ b/hosts/yodaHedgehog/host-specific.nix
@@ -127,6 +127,16 @@ in
         sleep 60s
       done
 
+      # Wait until no nix garbage collection service is running.
+      while :; do
+        running_services="$(systemctl list-units --type=service --plain --quiet | awk '{ print $1 }')"
+        if ! printf '%s' "''${running_services}" | grep '^nix-gc.service$'; then
+          break;
+        fi
+        printf '%s\n' 'Delaying suspend due to running nix garbage collection service.'
+        sleep 60s
+      done
+
       # Send filtered journal by email.
       systemctl start journalwatch.service ||:
       # Send notification by email.