3 files changed, 12 insertions, 4 deletions
diff --git a/logic/minecraft/MojangVersionFormat.cpp b/logic/minecraft/MojangVersionFormat.cpp
index e28a38ab..4d6f205b 100644
--- a/logic/minecraft/MojangVersionFormat.cpp
+++ b/logic/minecraft/MojangVersionFormat.cpp
@@ -63,13 +63,12 @@ VersionFilePtr MojangVersionFormat::versionFileFromJson(const QJsonDocument &doc
 
 	if (root.contains("libraries"))
 	{
-		out->shouldOverwriteLibs = true;
 		for (auto libVal : requireArray(root.value("libraries")))
 		{
 			auto libObj = requireObject(libVal);
 
 			auto lib = OneSixVersionFormat::libraryFromJson(libObj, filename);
-			out->overwriteLibs.append(lib);
+			out->addLibs.append(lib);
 		}
 	}
 	return out;
@@ -86,6 +85,10 @@ static QJsonDocument versionFileToJson(VersionFilePtr patch)
 	writeString(root, "assets", patch->assets);
 	writeString(root, "releaseTime", timeToS3Time(patch->m_releaseTime));
 	writeString(root, "time", timeToS3Time(patch->m_updateTime));
+	if(patch->minimumLauncherVersion != -1)
+	{
+		root.insert("minimumLauncherVersion", patch->minimumLauncherVersion);
+	}
 
 	if (!patch->addLibs.isEmpty())
 	{
diff --git a/logic/minecraft/MojangVersionFormat.h b/logic/minecraft/MojangVersionFormat.h
index 925990ab..cd87d68e 100644
--- a/logic/minecraft/MojangVersionFormat.h
+++ b/logic/minecraft/MojangVersionFormat.h
@@ -3,7 +3,9 @@
 #include <minecraft/VersionFile.h>
 #include <QJsonDocument>
 
-class MojangVersionFormat
+#include "multimc_logic_export.h"
+
+class MULTIMC_LOGIC_EXPORT MojangVersionFormat
 {
 public:
 	// version files / profile patches
diff --git a/logic/minecraft/OneSixRule.cpp b/logic/minecraft/OneSixRule.cpp
index fc9f8f71..3f4a6bb9 100644
--- a/logic/minecraft/OneSixRule.cpp
+++ b/logic/minecraft/OneSixRule.cpp
@@ -82,7 +82,10 @@ QJsonObject OsRule::toJson()
 	QJsonObject osObj;
 	{
 		osObj.insert("name", OpSys_toString(m_system));
-		osObj.insert("version", m_version_regexp);
+		if(!m_version_regexp.isEmpty())
+		{
+			osObj.insert("version", m_version_regexp);
+		}
 	}
 	ruleObj.insert("os", osObj);
 	return ruleObj;