diff --git a/dropshell-build/build.sh b/dropshell-build/build.sh
index 28fdcb0..24e3517 100755
--- a/dropshell-build/build.sh
+++ b/dropshell-build/build.sh
@@ -2,5 +2,7 @@
 
 set -euo pipefail
 
-docker build -t gitea.jde.nz/public/dropshell-build:latest -f Dockerfile .
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+
+docker build -t gitea.jde.nz/public/dropshell-build:latest -f "${SCRIPT_DIR}/Dockerfile" "${SCRIPT_DIR}"