As of Fedora 40 compose Fedora-40-20240414.0, all image types (iot-commit, iot-installer, iot-minimal, iot-raw-image, iot-simplified-installer) are failing in downstream tests when depsolving blueprints.

osbuild noarch  125-1.fc40
osbuild-composer x86_64  115-1.fc40

Following lines show the error log:

+ greenprint '📋 Preparing blueprint'
+ echo -e '\033[1;32m📋 Preparing blueprint\033[0m'
[1;32m📋 Preparing blueprint[0m
+ sudo composer-cli blueprints push /tmp/tmp.2oMhMMcIqp/blueprint.toml
+ sudo composer-cli blueprints depsolve container
ERROR: BlueprintsError: container: decoding depsolve result failed: json: unknown field "solver"

Complete log available at: https://artifacts.osci.redhat.com/testing-farm/bbb08815-7221-485c-91e7-40377cc8316d/work-edge-x86-installerw9uisax2/tmt/plans/edge-test/edge-x86-installer/execute/data/guest/default-0/tmt/tests/edge-test-1/output.txt


This is also happening during dependency solving of iot-commit:
+ tee /tmp/tmp.aOqaaOL3f4/blueprint.toml
+ [[ false == \t\r\u\e ]]
+ [[ false == \t\r\u\e ]]
+ [[ false == \t\r\u\e ]]
+ [[ true == \t\r\u\e ]]
+ tee -a /tmp/tmp.aOqaaOL3f4/blueprint.toml
+ build_image /tmp/tmp.aOqaaOL3f4/blueprint.toml ostree
+ blueprint_file=/tmp/tmp.aOqaaOL3f4/blueprint.toml
+ blueprint_name=ostree
+ greenprint '📋 Preparing blueprint'
+ echo -e '\033[1;32m📋 Preparing blueprint\033[0m'
[1;32m📋 Preparing blueprint[0m
+ sudo composer-cli blueprints push /tmp/tmp.aOqaaOL3f4/blueprint.toml
+ sudo composer-cli blueprints depsolve ostree
ERROR: BlueprintsError: ostree: decoding depsolve result failed: json: unknown field "solver"
blueprint: ostree v0.0.1
Shared connection to 10.0.58.242 closed.

The blueprint file is the following:
name = "ostree"
description = "A base ostree image"
version = "0.0.1"
modules = []
groups = []
[[packages]]
name = "python3"
version = "*"
[[customizations.directories]]
path = "/etc/custom_dir/dir1"
user = 1020
group = 1020
mode = "0770"
ensure_parents = true

[[customizations.files]]
path = "/etc/systemd/system/custom.service"
data = "[Unit]\nDescription=Custom service\n[Service]\nType=oneshot\nRemainAfterExit=yes\nExecStart=/usr/bin/false\n[Install]\nWantedBy=multi-user.target\n"

[[customizations.files]]
path = "/etc/custom_file.txt"
data = "image builder is the best\n"

[[customizations.directories]]
path = "/etc/systemd/system/custom.service.d"

[[customizations.files]]
path = "/etc/systemd/system/custom.service.d/override.conf"
data = "[Service]\nExecStart=\nExecStart=/usr/bin/cat /etc/custom_file.txt\n"

[customizations.services]
enabled = ["custom.service"]


Complete log available at: https://artifacts.osci.redhat.com/testing-farm/bbb08815-7221-485c-91e7-40377cc8316d/work-edge-x86-commit9mbxvhrw/tmt/plans/edge-test/edge-x86-commit/execute/data/guest/default-0/tmt/tests/edge-test-1/output.txt



Reproducible: Always

Steps to Reproduce:
1.Deploy Openstack Fedora-40 vm
2. git clone https://github.com/virt-s1/rhel-edge.git && cd rhel-edge/
3. DOWNLOAD_NODE=<download-node> ./ostree.sh
Actual Results:  
Decoding depsolve result failed.

Expected Results:  
Depsolve successful.