Unable to execute tt pack due to json dependency

Steps to reproduce:

• Rockspec

version = 'scm-1'
source   = {
    url = '/tmp',
}

dependencies = {
    'lua >= 5.1',
    'tarantool >= 2.11.0',
    'vshard == 0.1.23-1',
    'http == 1.5.0-1'
}

build = {
    type = 'none';
    variables = {
        TARANTOOL_DIR="$(TARANTOOL_DIR)";
    };
}

• Tarantool CLI EE 1.3.0, linux/amd64. commit: 0a55fe2
• Tarantool Enterprise 2.11.1-0-gc42d9735b-r595-gc64

tt pack tgz occurs an error

Error: Could not satisfy dependency json: No results matching query were found for Lua 5.1.

The problem is in one of rockspec files in sdk examples - sdk/examples/ora_writebehind_cache/oracle_rb_cache-0.1.0-1.rockspec

package = "oracle_rb_cache"

version = "0.1.0-1"

description = {
    summary = "Oracle write behind cache sample implementation",
    homepage = "http://tarantool.org"
}

dependencies = {
    'tarantool',
    'json',
    'oracle',
    'http == 1.0.5'
}

source = {
    url = "git@gitlab.com/tarantool/enterprise/central.git"
}

build = {
    type = "none",
}

After this file was removed tt pack worked properly.

Start with sdk/examples/ora_writebehind_cache/oracle_rb_cache-0.1.0-1.rockspec and reproduce the failure using tt pack tgz with the provided rockspec and environment details. Check how its json dependency is resolved for Lua 5.1; done means the example no longer causes the reported dependency error and tt pack tgz completes successfully.