diff --git a/block/nvme.c b/block/nvme.c
index 29294038fc..982097b5b1 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -837,7 +837,7 @@ try_map:
         }
 
         for (j = 0; j < qiov->iov[i].iov_len / s->page_size; j++) {
-            pagelist[entries++] = iova + j * s->page_size;
+            pagelist[entries++] = cpu_to_le64(iova + j * s->page_size);
         }
         trace_nvme_cmd_map_qiov_iov(s, i, qiov->iov[i].iov_base,
                                     qiov->iov[i].iov_len / s->page_size);
@@ -850,20 +850,16 @@ try_map:
     case 0:
         abort();
     case 1:
-        cmd->prp1 = cpu_to_le64(pagelist[0]);
+        cmd->prp1 = pagelist[0];
         cmd->prp2 = 0;
         break;
     case 2:
-        cmd->prp1 = cpu_to_le64(pagelist[0]);
-        cmd->prp2 = cpu_to_le64(pagelist[1]);;
+        cmd->prp1 = pagelist[0];
+        cmd->prp2 = pagelist[1];
         break;
     default:
-        cmd->prp1 = cpu_to_le64(pagelist[0]);
-        cmd->prp2 = cpu_to_le64(req->prp_list_iova);
-        for (i = 0; i < entries - 1; ++i) {
-            pagelist[i] = cpu_to_le64(pagelist[i + 1]);
-        }
-        pagelist[entries - 1] = 0;
+        cmd->prp1 = pagelist[0];
+        cmd->prp2 = cpu_to_le64(req->prp_list_iova + sizeof(uint64_t));
         break;
     }
     trace_nvme_cmd_map_qiov(s, cmd, req, qiov, entries);
diff --git a/tests/docker/dockerfiles/debian-sid.docker b/tests/docker/dockerfiles/debian-sid.docker
index 9a3d168705..4e4cda0ba5 100644
--- a/tests/docker/dockerfiles/debian-sid.docker
+++ b/tests/docker/dockerfiles/debian-sid.docker
@@ -13,6 +13,10 @@
 
 FROM debian:sid-slim
 
+# Use a snapshot known to work (see http://snapshot.debian.org/#Usage)
+ENV DEBIAN_SNAPSHOT_DATE "20181030"
+RUN sed -i "s%^deb \(https\?://\)deb.debian.org/debian/\? \(.*\)%deb [check-valid-until=no] \1snapshot.debian.org/archive/debian/${DEBIAN_SNAPSHOT_DATE} \2%" /etc/apt/sources.list
+
 # Duplicate deb line as deb-src
 RUN cat /etc/apt/sources.list | sed "s/^deb\ /deb-src /" >> /etc/apt/sources.list