diff --git a/support/rundk b/support/rundk
index 235edd7..4c02c16 100755
--- a/support/rundk
+++ b/support/rundk
@@ -172,6 +172,18 @@ if [ -z "$_RUNDK_IN_DOCKER" ]; then
     fi
     IMAGENAME=nulib/rundk
 
+    if [ -z "$bootstrap" ]; then
+        if [ -f "$PROJDIR/$BUILDENV" ]; then
+            source "$PROJDIR/$BUILDENV" || exit 1
+        fi
+        if [ -z "$IMAGE" ]; then
+            [ -n "$PRIVAREG" ] && IMAGE="$PRIVAREG/$IMAGENAME" || IMAGE="$REGISTRY/$IMAGENAME"
+        fi
+        if [ -z "$(docker image ls --no-trunc --format '{{.Repository}}:{{.Tag}}' "$IMAGE" 2>/dev/null)" ]; then
+            bootstrap=1
+        fi
+    fi
+
     if [ -n "$bootstrap" ]; then
         BUILD_ARGS=(
             REGISTRY
@@ -309,10 +321,6 @@ OPTIONS
             esac
             shift
         done
-
-        if [ -z "$IMAGE" ]; then
-            [ -n "$PRIVAREG" ] && IMAGE="$PRIVAREG/$IMAGENAME" || IMAGE="$REGISTRY/$IMAGENAME"
-        fi
     fi
 
     ## Lancer la commande