diff --git a/sources/org.osbuild.skopeo b/sources/org.osbuild.skopeo
index 72c2fef7..ee02045a 100755
--- a/sources/org.osbuild.skopeo
+++ b/sources/org.osbuild.skopeo
@@ -102,10 +102,8 @@ class SkopeoSource(sources.SourceService):
             # Verify that the digest supplied downloaded the correct container image id.
             # The image id is the digest of the config, but skopeo can' currently
             # get the config id, only the full config, so we checksum it ourselves.
-            res = subprocess.run(["skopeo", "inspect", "--raw", "--config", destination],
-                                 capture_output=True,
-                                 check=True)
-            downloaded_id = "sha256:" + hashlib.sha256(res.stdout).hexdigest()
+            res = subprocess.check_output(["skopeo", "inspect", "--raw", "--config", destination])
+            downloaded_id = "sha256:" + hashlib.sha256(res).hexdigest()
             if downloaded_id != image_id:
                 raise RuntimeError(
                     f"Downloaded image {imagename}@{digest} has a id of {downloaded_id}, but expected {image_id}")