Makefile: test-system-local checks for SKOPEO_BINARY

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>

Makefile

@@ -220,8 +220,7 @@ test-system:
 	exit $$rc
 
 # Intended for CI, assumed to already be running in quay.io/libpod/skopeo_cidev container.
-test-system-local: bin/skopeo
-	hack/warn-destructive-tests.sh
+test-system-local: $(if $(SKOPEO_BINARY),,bin/skopeo)
 	hack/test-system.sh
 
 test-unit:

hack/test-system.sh

@@ -37,8 +37,12 @@ EOF
     export CONTAINERS_STORAGE_CONF=/etc/containers/storage.conf
 fi
 
-# Build skopeo, install into /usr/bin
-make PREFIX=/usr install
+# Print what binary is being used for tests
+if [[ -v SKOPEO_BINARY ]]; then
+    echo "Testing with $SKOPEO_BINARY ..."
+else
+    echo "Testing with $(git rev-parse --show-toplevel)/bin/skopeo ..."
+fi
 
-# Run tests
-SKOPEO_BINARY=/usr/bin/skopeo bats --tap systemtest
+# The skopeo binary will be at ../bin/skopeo unless set via SKOPEO_BINARY var
+bats --tap systemtest