diff --git a/.github/scripts/prepare_JREs.sh b/.github/scripts/prepare_JREs.sh
deleted file mode 100755
index ee713f81f..000000000
--- a/.github/scripts/prepare_JREs.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/usr/bin/env bash
-
-URL_JDK8="https://api.adoptium.net/v3/binary/version/jdk8u312-b07/linux/x64/jre/hotspot/normal/eclipse"
-URL_JDK17="https://api.adoptium.net/v3/binary/latest/17/ga/linux/x64/jre/hotspot/normal/eclipse"
-
-mkdir -p JREs
-pushd JREs
-
-wget --content-disposition "$URL_JDK8"
-wget --content-disposition "$URL_JDK17"
-
-for file in *;
-do
-    mkdir temp
-
-    re='(OpenJDK([[:digit:]]+)U-jre_x64_linux_hotspot_([[:digit:]]+)(.*).tar.gz)'
-    if [[ $file =~ $re ]];
-    then
-        version_major=${BASH_REMATCH[2]}
-        version_trailing=${BASH_REMATCH[4]}
-
-        if [ $version_major = 17 ];
-        then
-            hyphen='-'
-        else
-            hyphen=''
-        fi
-
-        version_edit=$(echo $version_trailing | sed -e 's/_/+/g' | sed -e 's/b/-b/g')
-        dir_name=jdk$hyphen$version_major$version_edit-jre
-        mkdir jre$version_major
-        tar -xzf $file -C temp
-        pushd temp/$dir_name
-        cp -r . ../../jre$version_major
-        popd
-    fi
-
-    rm -rf temp
-done
-
-popd
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 14c725b63..f3896550f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -76,7 +76,7 @@ jobs:
             qt_ver: 6
             qt_host: windows
             qt_arch: ''
-            qt_version: '6.6.2'
+            qt_version: '6.7.0'
             qt_modules: 'qt5compat qtimageformats'
             qt_tools: ''
 
@@ -88,7 +88,7 @@ jobs:
             qt_ver: 6
             qt_host: windows
             qt_arch: 'win64_msvc2019_arm64'
-            qt_version: '6.6.2'
+            qt_version: '6.7.0'
             qt_modules: 'qt5compat qtimageformats'
             qt_tools: ''
 
@@ -98,7 +98,7 @@ jobs:
             qt_ver: 6
             qt_host: mac
             qt_arch: ''
-            qt_version: '6.6.2'
+            qt_version: '6.7.0'
             qt_modules: 'qt5compat qtimageformats'
             qt_tools: ''
 
@@ -259,7 +259,6 @@ jobs:
 
           wget "https://github.com/AppImageCommunity/AppImageUpdate/releases/download/continuous/AppImageUpdate-x86_64.AppImage"
 
-          ${{ github.workspace }}/.github/scripts/prepare_JREs.sh
           sudo apt install libopengl0
 
       - name: Add QT_HOST_PATH var (Windows MSVC arm64)
@@ -528,13 +527,9 @@ jobs:
 
           chmod +x linuxdeploy-*.AppImage
 
-          mkdir -p ${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/jvm/java-{8,17}-openjdk
+          mkdir -p ${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib
           mkdir -p ${{ env.INSTALL_APPIMAGE_DIR }}/usr/plugins/iconengines
 
-          cp -r ${{ github.workspace }}/JREs/jre8/* ${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/jvm/java-8-openjdk
-
-          cp -r ${{ github.workspace }}/JREs/jre17/* ${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/jvm/java-17-openjdk
-
           cp -r ${{ runner.workspace }}/Qt/${{ matrix.qt_version }}/gcc_64/plugins/iconengines/* ${{ env.INSTALL_APPIMAGE_DIR }}/usr/plugins/iconengines
 
           cp /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 ${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/
@@ -542,10 +537,6 @@ jobs:
           cp /usr/lib/x86_64-linux-gnu/libOpenGL.so.0* ${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/
 
           LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib"
-          LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/jvm/java-8-openjdk/lib/amd64/server"
-          LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/jvm/java-8-openjdk/lib/amd64"
-          LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/jvm/java-17-openjdk/lib/server"
-          LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${{ env.INSTALL_APPIMAGE_DIR }}/usr/lib/jvm/java-17-openjdk/lib"
           export LD_LIBRARY_PATH
 
           chmod +x AppImageUpdate-x86_64.AppImage
diff --git a/flake.lock b/flake.lock
index dcc028b2d..0fbfca9cc 100644
--- a/flake.lock
+++ b/flake.lock
@@ -23,11 +23,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1709336216,
-        "narHash": "sha256-Dt/wOWeW6Sqm11Yh+2+t0dfEWxoMxGBvv3JpIocFl9E=",
+        "lastModified": 1712014858,
+        "narHash": "sha256-sB4SWl2lX95bExY2gMFG5HIzvva5AVMJd4Igm+GpZNw=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "f7b3c975cf067e56e7cda6cb098ebe3fb4d74ca2",
+        "rev": "9126214d0a59633752a136528f5f3b9aa8565b7d",
         "type": "github"
       },
       "original": {
@@ -93,11 +93,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1711715736,
-        "narHash": "sha256-9slQ609YqT9bT/MNX9+5k5jltL9zgpn36DpFB7TkttM=",
+        "lastModified": 1713596654,
+        "narHash": "sha256-LJbHQQ5aX1LVth2ST+Kkse/DRzgxlVhTL1rxthvyhZc=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "807c549feabce7eddbf259dbdcec9e0600a0660d",
+        "rev": "fd16bb6d3bcca96039b11aa52038fafeb6e4f4be",
         "type": "github"
       },
       "original": {
@@ -122,11 +122,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1711760932,
-        "narHash": "sha256-DqUTQ2iAAqSDwMhKBqvi24v0Oc7pD3LCK/0FCG//TdA=",
+        "lastModified": 1712897695,
+        "narHash": "sha256-nMirxrGteNAl9sWiOhoN5tIHyjBbVi5e2tgZUgZlK3Y=",
         "owner": "cachix",
         "repo": "pre-commit-hooks.nix",
-        "rev": "c11e43aed6f17336c25cd120eac886b96c455731",
+        "rev": "40e6053ecb65fcbf12863338a6dcefb3f55f1bf8",
         "type": "github"
       },
       "original": {
diff --git a/flatpak/org.prismlauncher.PrismLauncher.yml b/flatpak/org.prismlauncher.PrismLauncher.yml
index c3ac132b1..b4c6e8143 100644
--- a/flatpak/org.prismlauncher.PrismLauncher.yml
+++ b/flatpak/org.prismlauncher.PrismLauncher.yml
@@ -3,6 +3,7 @@ runtime: org.kde.Platform
 runtime-version: 5.15-23.08
 sdk: org.kde.Sdk
 sdk-extensions:
+  - org.freedesktop.Sdk.Extension.openjdk21
   - org.freedesktop.Sdk.Extension.openjdk17
   - org.freedesktop.Sdk.Extension.openjdk8
 
@@ -50,6 +51,8 @@ modules:
     buildsystem: simple
     build-commands:
       - mkdir -p /app/jdk/
+      - /usr/lib/sdk/openjdk21/install.sh
+      - mv /app/jre /app/jdk/21
       - /usr/lib/sdk/openjdk17/install.sh
       - mv /app/jre /app/jdk/17
       - /usr/lib/sdk/openjdk8/install.sh
diff --git a/launcher/Application.cpp b/launcher/Application.cpp
index 9f54e7dd9..bb8751ccc 100644
--- a/launcher/Application.cpp
+++ b/launcher/Application.cpp
@@ -225,6 +225,7 @@ Application::Application(int& argc, char** argv) : QApplication(argc, argv)
 
     // Don't quit on hiding the last window
     this->setQuitOnLastWindowClosed(false);
+    this->setQuitLockEnabled(false);
 
     // Commandline parsing
     QCommandLineParser parser;
diff --git a/launcher/FileSystem.cpp b/launcher/FileSystem.cpp
index f9be91a2a..70704e1d3 100644
--- a/launcher/FileSystem.cpp
+++ b/launcher/FileSystem.cpp
@@ -801,15 +801,24 @@ QString NormalizePath(QString path)
     }
 }
 
-QString badFilenameChars = "\"\\/?<>:;*|!+\r\n";
+static const QString BAD_PATH_CHARS = "\"?<>:;*|!+\r\n";
+static const QString BAD_FILENAME_CHARS = BAD_PATH_CHARS + "\\/";
 
 QString RemoveInvalidFilenameChars(QString string, QChar replaceWith)
 {
-    for (int i = 0; i < string.length(); i++) {
-        if (badFilenameChars.contains(string[i])) {
+    for (int i = 0; i < string.length(); i++)
+        if (string.at(i) < ' ' || BAD_FILENAME_CHARS.contains(string.at(i)))
             string[i] = replaceWith;
-        }
-    }
+
+    return string;
+}
+
+QString RemoveInvalidPathChars(QString string, QChar replaceWith)
+{
+    for (int i = 0; i < string.length(); i++)
+        if (string.at(i) < ' ' || BAD_PATH_CHARS.contains(string.at(i)))
+            string[i] = replaceWith;
+
     return string;
 }
 
@@ -1585,4 +1594,44 @@ uintmax_t hardLinkCount(const QString& path)
     return count;
 }
 
+#ifdef Q_OS_WIN
+// returns 8.3 file format from long path
+QString shortPathName(const QString& file)
+{
+    auto input = file.toStdWString();
+    std::wstring output;
+    long length = GetShortPathNameW(input.c_str(), NULL, 0);
+    if (length == 0)
+        return {};
+    // NOTE: this resizing might seem weird...
+    // when GetShortPathNameW fails, it returns length including null character
+    // when it succeeds, it returns length excluding null character
+    // See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa364989(v=vs.85).aspx
+    output.resize(length);
+    if (GetShortPathNameW(input.c_str(), (LPWSTR)output.c_str(), length) == 0)
+        return {};
+    output.resize(length - 1);
+    QString ret = QString::fromStdWString(output);
+    return ret;
+}
+
+// if the string survives roundtrip through local 8bit encoding...
+bool fitsInLocal8bit(const QString& string)
+{
+    return string == QString::fromLocal8Bit(string.toLocal8Bit());
+}
+
+QString getPathNameInLocal8bit(const QString& file)
+{
+    if (!fitsInLocal8bit(file)) {
+        auto path = shortPathName(file);
+        if (!path.isEmpty()) {
+            return path;
+        }
+        // in case shortPathName fails just return the path as is
+    }
+    return file;
+}
+#endif
+
 }  // namespace FS
diff --git a/launcher/FileSystem.h b/launcher/FileSystem.h
index f13fb9f28..5496c3795 100644
--- a/launcher/FileSystem.h
+++ b/launcher/FileSystem.h
@@ -342,6 +342,8 @@ QString NormalizePath(QString path);
 
 QString RemoveInvalidFilenameChars(QString string, QChar replaceWith = '-');
 
+QString RemoveInvalidPathChars(QString string, QChar replaceWith = '-');
+
 QString DirNameFromString(QString string, QString inDir = ".");
 
 /// Checks if the a given Path contains "!"
@@ -551,4 +553,8 @@ bool canLink(const QString& src, const QString& dst);
 
 uintmax_t hardLinkCount(const QString& path);
 
+#ifdef Q_OS_WIN
+QString getPathNameInLocal8bit(const QString& file);
+#endif
+
 }  // namespace FS
diff --git a/launcher/InstanceImportTask.h b/launcher/InstanceImportTask.h
index a1cf2560b..28efd7ec5 100644
--- a/launcher/InstanceImportTask.h
+++ b/launcher/InstanceImportTask.h
@@ -47,9 +47,6 @@
 #include <optional>
 
 class QuaZip;
-namespace Flame {
-class FileResolvingTask;
-}
 
 class InstanceImportTask : public InstanceTask {
     Q_OBJECT
@@ -79,7 +76,6 @@ class InstanceImportTask : public InstanceTask {
 
    private: /* data */
     NetJob::Ptr m_filesNetJob;
-    shared_qobject_ptr<Flame::FileResolvingTask> m_modIdResolver;
     QUrl m_sourceUrl;
     QString m_archivePath;
     bool m_downloadRequired = false;
diff --git a/launcher/MMCZip.cpp b/launcher/MMCZip.cpp
index 033aa0755..9a5ae7a9d 100644
--- a/launcher/MMCZip.cpp
+++ b/launcher/MMCZip.cpp
@@ -119,6 +119,7 @@ bool compressDirFiles(QuaZip* zip, QString dir, QFileInfoList files, bool follow
 bool compressDirFiles(QString fileCompressed, QString dir, QFileInfoList files, bool followSymlinks)
 {
     QuaZip zip(fileCompressed);
+    zip.setUtf8Enabled(true);
     QDir().mkpath(QFileInfo(fileCompressed).absolutePath());
     if (!zip.open(QuaZip::mdCreate)) {
         QFile::remove(fileCompressed);
@@ -141,6 +142,7 @@ bool compressDirFiles(QString fileCompressed, QString dir, QFileInfoList files,
 bool createModdedJar(QString sourceJarPath, QString targetJarPath, const QList<Mod*>& mods)
 {
     QuaZip zipOut(targetJarPath);
+    zipOut.setUtf8Enabled(true);
     if (!zipOut.open(QuaZip::mdCreate)) {
         QFile::remove(targetJarPath);
         qCritical() << "Failed to open the minecraft.jar for modding";
@@ -286,10 +288,13 @@ std::optional<QStringList> extractSubDir(QuaZip* zip, const QString& subdir, con
 
     do {
         QString file_name = zip->getCurrentFileName();
+#ifdef Q_OS_WIN
+        file_name = FS::RemoveInvalidPathChars(file_name);
+#endif
         if (!file_name.startsWith(subdir))
             continue;
 
-        auto relative_file_name = QDir::fromNativeSeparators(file_name.remove(0, subdir.size()));
+        auto relative_file_name = QDir::fromNativeSeparators(file_name.mid(subdir.size()));
         auto original_name = relative_file_name;
 
         // Fix subdirs/files ending with a / getting transformed into absolute paths
diff --git a/launcher/MMCZip.h b/launcher/MMCZip.h
index 93692d0d2..43b4ab933 100644
--- a/launcher/MMCZip.h
+++ b/launcher/MMCZip.h
@@ -163,6 +163,7 @@ class ExportToZipTask : public Task {
         , m_follow_symlinks(followSymlinks)
     {
         setAbortable(true);
+        m_output.setUtf8Enabled(true);
     };
     ExportToZipTask(QString outputPath, QString dir, QFileInfoList files, QString destinationPrefix = "", bool followSymlinks = false)
         : ExportToZipTask(outputPath, QDir(dir), files, destinationPrefix, followSymlinks){};
diff --git a/launcher/java/JavaChecker.cpp b/launcher/java/JavaChecker.cpp
index 20caba189..fc8da55c2 100644
--- a/launcher/java/JavaChecker.cpp
+++ b/launcher/java/JavaChecker.cpp
@@ -55,6 +55,9 @@ void JavaChecker::performCheck()
         qDebug() << "Java checker library could not be found. Please check your installation.";
         return;
     }
+#ifdef Q_OS_WIN
+    checkerJar = FS::getPathNameInLocal8bit(checkerJar);
+#endif
 
     QStringList args;
 
diff --git a/launcher/java/JavaUtils.cpp b/launcher/java/JavaUtils.cpp
index 074bf54df..3627cec39 100644
--- a/launcher/java/JavaUtils.cpp
+++ b/launcher/java/JavaUtils.cpp
@@ -413,6 +413,8 @@ QList<QString> JavaUtils::FindJavaPaths()
     scanJavaDirs(FS::PathCombine(home, ".jdks"));
     // javas downloaded by sdkman
     scanJavaDirs(FS::PathCombine(home, ".sdkman/candidates/java"));
+    // javas downloaded by gradle (toolchains)
+    scanJavaDirs(FS::PathCombine(home, ".gradle/jdks"));
 
     javas.append(getMinecraftJavaBundle());
     javas = addJavasFromEnv(javas);
@@ -439,26 +441,25 @@ QString JavaUtils::getJavaCheckPath()
 
 QStringList getMinecraftJavaBundle()
 {
-    QString partialPath;
     QString executable = "java";
     QStringList processpaths;
 #if defined(Q_OS_OSX)
-    partialPath = FS::PathCombine(QDir::homePath(), "Library/Application Support");
+    processpaths << FS::PathCombine(QDir::homePath(), FS::PathCombine("Library", "Application Support", "minecraft", "runtime"));
 #elif defined(Q_OS_WIN32)
-    partialPath = QProcessEnvironment::systemEnvironment().value("LOCALAPPDATA", "");
     executable += "w.exe";
 
+    auto appDataPath = QProcessEnvironment::systemEnvironment().value("APPDATA", "");
+    processpaths << FS::PathCombine(QFileInfo(appDataPath).absoluteFilePath(), ".minecraft", "runtime");
+
     // add the microsoft store version of the launcher to the search. the current path is:
     // C:\Users\USERNAME\AppData\Local\Packages\Microsoft.4297127D64EC6_8wekyb3d8bbwe\LocalCache\Local\runtime
+    auto localAppDataPath = QProcessEnvironment::systemEnvironment().value("LOCALAPPDATA", "");
     auto minecraftMSStorePath =
-        FS::PathCombine(QFileInfo(partialPath).absolutePath(), "Local", "Packages", "Microsoft.4297127D64EC6_8wekyb3d8bbwe");
-    minecraftMSStorePath = FS::PathCombine(minecraftMSStorePath, "LocalCache", "Local", "runtime");
-    processpaths << minecraftMSStorePath;
+        FS::PathCombine(QFileInfo(localAppDataPath).absoluteFilePath(), "Packages", "Microsoft.4297127D64EC6_8wekyb3d8bbwe");
+    processpaths << FS::PathCombine(minecraftMSStorePath, "LocalCache", "Local", "runtime");
 #else
-    partialPath = QDir::homePath();
+    processpaths << FS::PathCombine(QDir::homePath(), ".minecraft", "runtime");
 #endif
-    auto minecraftDataPath = FS::PathCombine(partialPath, ".minecraft", "runtime");
-    processpaths << minecraftDataPath;
 
     QStringList javas;
     while (!processpaths.isEmpty()) {
diff --git a/launcher/minecraft/launch/ExtractNatives.cpp b/launcher/minecraft/launch/ExtractNatives.cpp
index 8f3cac4d1..405008f40 100644
--- a/launcher/minecraft/launch/ExtractNatives.cpp
+++ b/launcher/minecraft/launch/ExtractNatives.cpp
@@ -79,6 +79,7 @@ void ExtractNatives::executeTask()
     auto settings = minecraftInstance->settings();
 
     auto outputPath = minecraftInstance->getNativePath();
+    FS::ensureFolderPathExists(outputPath);
     auto javaVersion = minecraftInstance->getJavaVersion();
     bool jniHackEnabled = javaVersion.major() >= 8;
     for (const auto& source : toExtract) {
diff --git a/launcher/minecraft/launch/ExtractNatives.h b/launcher/minecraft/launch/ExtractNatives.h
index 2ab8816bd..4837a9dbb 100644
--- a/launcher/minecraft/launch/ExtractNatives.h
+++ b/launcher/minecraft/launch/ExtractNatives.h
@@ -16,8 +16,6 @@
 #pragma once
 
 #include <launch/LaunchStep.h>
-#include <memory>
-#include "minecraft/auth/AuthSession.h"
 
 // FIXME: temporary wrapper for existing task.
 class ExtractNatives : public LaunchStep {
diff --git a/launcher/minecraft/launch/LauncherPartLaunch.cpp b/launcher/minecraft/launch/LauncherPartLaunch.cpp
index aa94edb5d..4e021c4a8 100644
--- a/launcher/minecraft/launch/LauncherPartLaunch.cpp
+++ b/launcher/minecraft/launch/LauncherPartLaunch.cpp
@@ -66,32 +66,6 @@ LauncherPartLaunch::LauncherPartLaunch(LaunchTask* parent) : LaunchStep(parent)
     connect(&m_process, &LoggedProcess::stateChanged, this, &LauncherPartLaunch::on_state);
 }
 
-#ifdef Q_OS_WIN
-// returns 8.3 file format from long path
-#include <windows.h>
-QString shortPathName(const QString& file)
-{
-    auto input = file.toStdWString();
-    std::wstring output;
-    long length = GetShortPathNameW(input.c_str(), NULL, 0);
-    // NOTE: this resizing might seem weird...
-    // when GetShortPathNameW fails, it returns length including null character
-    // when it succeeds, it returns length excluding null character
-    // See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa364989(v=vs.85).aspx
-    output.resize(length);
-    GetShortPathNameW(input.c_str(), (LPWSTR)output.c_str(), length);
-    output.resize(length - 1);
-    QString ret = QString::fromStdWString(output);
-    return ret;
-}
-#endif
-
-// if the string survives roundtrip through local 8bit encoding...
-bool fitsInLocal8bit(const QString& string)
-{
-    return string == QString::fromLocal8Bit(string.toLocal8Bit());
-}
-
 void LauncherPartLaunch::executeTask()
 {
     QString jarPath = APPLICATION->getJarPath("NewLaunch.jar");
@@ -136,24 +110,15 @@ void LauncherPartLaunch::executeTask()
 
     auto natPath = minecraftInstance->getNativePath();
 #ifdef Q_OS_WIN
-    if (!fitsInLocal8bit(natPath)) {
-        args << "-Djava.library.path=" + shortPathName(natPath);
-    } else {
-        args << "-Djava.library.path=" + natPath;
-    }
-#else
-    args << "-Djava.library.path=" + natPath;
+    natPath = FS::getPathNameInLocal8bit(natPath);
 #endif
+    args << "-Djava.library.path=" + natPath;
 
     args << "-cp";
 #ifdef Q_OS_WIN
     QStringList processed;
     for (auto& item : classPath) {
-        if (!fitsInLocal8bit(item)) {
-            processed << shortPathName(item);
-        } else {
-            processed << item;
-        }
+        processed << FS::getPathNameInLocal8bit(item);
     }
     args << processed.join(';');
 #else
diff --git a/launcher/minecraft/mod/tasks/LocalModParseTask.cpp b/launcher/minecraft/mod/tasks/LocalModParseTask.cpp
index e9e12d86a..3982f3338 100644
--- a/launcher/minecraft/mod/tasks/LocalModParseTask.cpp
+++ b/launcher/minecraft/mod/tasks/LocalModParseTask.cpp
@@ -469,7 +469,7 @@ bool processZIP(Mod& mod, [[maybe_unused]] ProcessingLevel level)
 
     QuaZipFile file(&zip);
 
-    if (zip.setCurrentFile("META-INF/mods.toml")) {
+    if (zip.setCurrentFile("META-INF/mods.toml") || zip.setCurrentFile("META-INF/neoforge.mods.toml")) {
         if (!file.open(QIODevice::ReadOnly)) {
             zip.close();
             return false;
diff --git a/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.cpp b/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.cpp
index 824fdce7e..a688cea87 100644
--- a/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.cpp
+++ b/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.cpp
@@ -20,6 +20,7 @@
 #include "ui/pages/modplatform/OptionalModDialog.h"
 
 #include <QAbstractButton>
+#include <QFileInfo>
 #include <vector>
 
 bool ModrinthCreationTask::abort()
@@ -58,6 +59,7 @@ bool ModrinthCreationTask::updateInstance()
         return false;
 
     auto version_name = inst->getManagedPackVersionName();
+    m_root_path = QFileInfo(inst->gameRoot()).fileName();
     auto version_str = !version_name.isEmpty() ? tr(" (version %1)").arg(version_name) : "";
 
     if (shouldConfirmUpdate()) {
@@ -173,7 +175,7 @@ bool ModrinthCreationTask::createInstance()
     FS::ensureFilePathExists(new_index_place);
     QFile::rename(index_path, new_index_place);
 
-    auto mcPath = FS::PathCombine(m_stagingPath, "minecraft");
+    auto mcPath = FS::PathCombine(m_stagingPath, m_root_path);
 
     auto override_path = FS::PathCombine(m_stagingPath, "overrides");
     if (QFile::exists(override_path)) {
@@ -234,7 +236,7 @@ bool ModrinthCreationTask::createInstance()
 
     m_files_job.reset(new NetJob(tr("Mod Download Modrinth"), APPLICATION->network()));
 
-    auto root_modpack_path = FS::PathCombine(m_stagingPath, "minecraft");
+    auto root_modpack_path = FS::PathCombine(m_stagingPath, m_root_path);
     auto root_modpack_url = QUrl::fromLocalFile(root_modpack_path);
 
     for (auto file : m_files) {
diff --git a/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.h b/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.h
index 1bd5b7de9..f07734a58 100644
--- a/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.h
+++ b/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.h
@@ -46,4 +46,6 @@ class ModrinthCreationTask final : public InstanceCreationTask {
     NetJob::Ptr m_files_job;
 
     std::optional<InstancePtr> m_instance;
+
+    QString m_root_path = "minecraft";
 };
diff --git a/launcher/ui/pages/modplatform/ImportPage.cpp b/launcher/ui/pages/modplatform/ImportPage.cpp
index ae4bd49d7..ed7ebfad9 100644
--- a/launcher/ui/pages/modplatform/ImportPage.cpp
+++ b/launcher/ui/pages/modplatform/ImportPage.cpp
@@ -123,6 +123,10 @@ void ImportPage::updateState()
             // need to find the download link for the modpack
             // format of url curseforge://install?addonId=IDHERE&fileId=IDHERE
             QUrlQuery query(url);
+            if (query.allQueryItemValues("addonId").isEmpty() || query.allQueryItemValues("fileId").isEmpty()) {
+                qDebug() << "Invalid curseforge link:" << url;
+                return;
+            }
             auto addonId = query.allQueryItemValues("addonId")[0];
             auto fileId = query.allQueryItemValues("fileId")[0];
             auto array = std::make_shared<QByteArray>();
diff --git a/nix/pkg/wrapper.nix b/nix/pkg/wrapper.nix
index cd356c8d7..1bcff1f9b 100644
--- a/nix/pkg/wrapper.nix
+++ b/nix/pkg/wrapper.nix
@@ -15,6 +15,7 @@
   openal,
   jdk8,
   jdk17,
+  jdk21,
   gamemode,
   flite,
   mesa-demos,
@@ -24,7 +25,7 @@
   gamemodeSupport ? stdenv.isLinux,
   textToSpeechSupport ? stdenv.isLinux,
   controllerSupport ? stdenv.isLinux,
-  jdks ? [jdk17 jdk8],
+  jdks ? [jdk21 jdk17 jdk8],
   additionalLibs ? [],
   additionalPrograms ? [],
 }: let