Problem might be fixed, TODO: test

src/TechTree.cpp

@@ -48,6 +48,7 @@ void TechTree::onStart()
             data.requiredUnits.clear();
             data.requiredUpgrades.clear();
             updated.insert(description.result_type);
+			data.buildTime = description.buildTime;
 
             data.buildAbility = sc2::ABILITY_ID::INVALID;
         }

src/TechTreeImproved.cpp

@@ -116,6 +116,7 @@ void parse_build_description(BuildDescription & description, json & build_item)
 {
     description.result_type = static_cast<sc2::UNIT_TYPEID>(build_item["unit"]);
     description.build_ability = static_cast<sc2::ABILITY_ID>(build_item["ability"]);
+	description.buildTime = static_cast<int>(build_item["time"]);
 
     if (build_item.find("requires") != build_item.end())
     {

src/TechTreeImproved.h

@@ -18,6 +18,7 @@ struct BuildDescription
     std::vector<sc2::UNIT_TYPEID> buildings_needed;
     std::vector<sc2::UNIT_TYPEID> addons_needed;
     std::vector<sc2::UPGRADE_ID> upgrades_needed;
+	int buildTime;
 };
 
 struct ResearchDescription