diff --git a/src/assets/AssetsLoader.cpp b/src/assets/AssetsLoader.cpp
index 8d9119ee..b9fcc1e3 100644
--- a/src/assets/AssetsLoader.cpp
+++ b/src/assets/AssetsLoader.cpp
@@ -11,6 +11,7 @@
 #include "../files/engine_paths.hpp"
 #include "../content/Content.hpp"
 #include "../content/ContentPack.hpp"
+#include "../voxels/Block.hpp"
 #include "../graphics/core/Texture.hpp"
 #include "../logic/scripting/scripting.hpp"
 
@@ -187,7 +188,7 @@ void AssetsLoader::addDefaults(AssetsLoader& loader, const Content* content) {
         loader.processPreloadConfigs(content);
 
         for (auto& entry : content->getBlockMaterials()) {
-            auto& material = entry.second;
+            auto& material = *entry.second;
             loader.tryAddSound(material.stepsSound);
             loader.tryAddSound(material.placeSound);
             loader.tryAddSound(material.breakSound);
diff --git a/src/audio/AL/ALAudio.cpp b/src/audio/AL/ALAudio.cpp
index bf5f7f13..939aa4ad 100644
--- a/src/audio/AL/ALAudio.cpp
+++ b/src/audio/AL/ALAudio.cpp
@@ -389,7 +389,7 @@ std::unique_ptr<Stream> ALAudio::openStream(std::shared_ptr<PCMStream> stream, b
     return std::make_unique<ALStream>(this, stream, keepSource);
 }
 
-ALAudio* ALAudio::create() {
+std::unique_ptr<ALAudio> ALAudio::create() {
     ALCdevice* device = alcOpenDevice(nullptr);
     if (device == nullptr)
         return nullptr;
@@ -400,7 +400,7 @@ ALAudio* ALAudio::create() {
     }
     AL_CHECK();
     logger.info() << "initialized";
-    return new ALAudio(device, context);
+    return std::make_unique<ALAudio>(device, context);
 }
 
 uint ALAudio::getFreeSource(){
diff --git a/src/audio/AL/ALAudio.hpp b/src/audio/AL/ALAudio.hpp
index 294b0224..f0a22dde 100644
--- a/src/audio/AL/ALAudio.hpp
+++ b/src/audio/AL/ALAudio.hpp
@@ -136,9 +136,8 @@ namespace audio {
         std::vector<uint> freebuffers;
 
         uint maxSources = 256;
-
-        ALAudio(ALCdevice* device, ALCcontext* context);
     public:
+        ALAudio(ALCdevice* device, ALCcontext* context);
         ~ALAudio();
 
         uint getFreeSource();
@@ -164,7 +163,7 @@ namespace audio {
             return false;
         }
 
-        static ALAudio* create();
+        static std::unique_ptr<ALAudio> create();
     };
 }
 
diff --git a/src/audio/NoAudio.cpp b/src/audio/NoAudio.cpp
index 3000b891..04dd2b77 100644
--- a/src/audio/NoAudio.cpp
+++ b/src/audio/NoAudio.cpp
@@ -17,6 +17,6 @@ std::unique_ptr<Stream> NoAudio::openStream(std::shared_ptr<PCMStream> stream, b
     return std::make_unique<NoStream>(stream, keepSource);
 }
 
-NoAudio* NoAudio::create() {
-    return new NoAudio();
+std::unique_ptr<NoAudio> NoAudio::create() {
+    return std::make_unique<NoAudio>();
 }
diff --git a/src/audio/NoAudio.hpp b/src/audio/NoAudio.hpp
index e24fb5c6..bc105139 100644
--- a/src/audio/NoAudio.hpp
+++ b/src/audio/NoAudio.hpp
@@ -81,7 +81,7 @@ namespace audio {
             return true;
         }
 
-        static NoAudio* create();
+        static std::unique_ptr<NoAudio> create();
     };
 }
 
diff --git a/src/audio/audio.cpp b/src/audio/audio.cpp
index 3829c16a..9fe62de0 100644
--- a/src/audio/audio.cpp
+++ b/src/audio/audio.cpp
@@ -147,11 +147,11 @@ public:
 
 void audio::initialize(bool enabled) {
     if (enabled) {
-        backend = ALAudio::create();
+        backend = ALAudio::create().release();
     }
     if (backend == nullptr) {
         std::cerr << "could not to initialize audio" << std::endl;
-        backend = NoAudio::create();
+        backend = NoAudio::create().release();
     }
     create_channel("master");
 }
@@ -333,7 +333,7 @@ int audio::create_channel(const std::string& name) {
     if (index != -1) {
         return index;
     }
-    channels.emplace_back(new Channel(name));
+    channels.emplace_back(std::make_unique<Channel>(name));
     return channels.size()-1;
 }
 
diff --git a/src/content/Content.cpp b/src/content/Content.cpp
index 4ba19fe3..4de7367c 100644
--- a/src/content/Content.cpp
+++ b/src/content/Content.cpp
@@ -10,127 +10,6 @@
 #include "ContentPack.hpp"
 #include "../logic/scripting/scripting.hpp"
 
-ContentBuilder::~ContentBuilder() {}
-
-void ContentBuilder::add(Block* def) {
-    checkIdentifier(def->name);
-    blockDefs[def->name] = def;
-    blockIds.push_back(def->name);
-}
-
-void ContentBuilder::add(ItemDef* def) {
-    checkIdentifier(def->name);
-    itemDefs[def->name] = def;
-    itemIds.push_back(def->name);
-}
-
-void ContentBuilder::add(ContentPackRuntime* pack) {
-    packs.emplace(pack->getId(), pack);
-}
-
-void ContentBuilder::add(BlockMaterial material) {
-    blockMaterials.emplace(material.name, material);
-}
-
-Block& ContentBuilder::createBlock(std::string id) {
-    auto found = blockDefs.find(id);
-    if (found != blockDefs.end()) {
-        return *found->second;
-        // throw namereuse_error("name "+id+" is already used", contenttype::item);
-    }
-    Block* block = new Block(id);
-    add(block);
-    return *block;
-}
-
-ItemDef& ContentBuilder::createItem(std::string id) {
-    auto found = itemDefs.find(id);
-    if (found != itemDefs.end()) {
-        // if (found->second->generated) {
-        return *found->second;
-        // }
-        // throw namereuse_error("name "+id+" is already used", contenttype::item);
-    }
-    ItemDef* item = new ItemDef(id);
-    add(item);
-    return *item;
-}
-
-void ContentBuilder::checkIdentifier(std::string id) {
-    contenttype result;
-    if (((result = checkContentType(id)) != contenttype::none)) {
-        throw namereuse_error("name "+id+" is already used", result);
-    }  
-}
-
-contenttype ContentBuilder::checkContentType(std::string id) {
-    if (blockDefs.find(id) != blockDefs.end()) {
-        return contenttype::block;
-    }
-    if (itemDefs.find(id) != itemDefs.end()) {
-        return contenttype::item;
-    }
-    return contenttype::none;
-}
-
-Content* ContentBuilder::build() {
-    std::vector<Block*> blockDefsIndices;
-    auto groups = std::make_unique<DrawGroups>();
-    for (const std::string& name : blockIds) {
-        Block* def = blockDefs[name];
-        
-        // Generating runtime info
-        def->rt.id = blockDefsIndices.size();
-        def->rt.emissive = *reinterpret_cast<uint32_t*>(def->emission);
-        def->rt.solid = def->model == BlockModel::block;
-
-        if (def->rotatable) {
-            for (uint i = 0; i < BlockRotProfile::MAX_COUNT; i++) {
-                def->rt.hitboxes[i].reserve(def->hitboxes.size());
-                for (AABB aabb : def->hitboxes) {
-                    def->rotations.variants[i].transform(aabb);
-                    def->rt.hitboxes[i].push_back(aabb);
-                }
-            }
-        }
-
-        blockDefsIndices.push_back(def);
-        groups->insert(def->drawGroup);
-    }
-
-    std::vector<ItemDef*> itemDefsIndices;
-    for (const std::string& name : itemIds) {
-        ItemDef* def = itemDefs[name];
-        
-        // Generating runtime info
-        def->rt.id = itemDefsIndices.size();
-        def->rt.emissive = *reinterpret_cast<uint32_t*>(def->emission);
-        itemDefsIndices.push_back(def);
-    }
-
-    auto indices = new ContentIndices(blockDefsIndices, itemDefsIndices);
-
-    auto content = std::make_unique<Content>(
-        indices, 
-        std::move(groups), 
-        blockDefs, 
-        itemDefs, 
-        std::move(packs), 
-        std::move(blockMaterials)
-    );
-
-    // Now, it's time to resolve foreign keys
-    for (Block* def : blockDefsIndices) {
-        def->rt.pickingItem = content->requireItem(def->pickingItem).rt.id;
-    }
-
-    for (ItemDef* def : itemDefsIndices) {
-        def->rt.placingBlock = content->requireBlock(def->placingBlock).rt.id;
-    }
-
-    return content.release();
-}
-
 ContentIndices::ContentIndices(
     std::vector<Block*> blockDefs, 
     std::vector<ItemDef*> itemDefs
@@ -139,27 +18,21 @@ ContentIndices::ContentIndices(
 {}
 
 Content::Content(
-    ContentIndices* indices, 
+    std::unique_ptr<ContentIndices> indices, 
     std::unique_ptr<DrawGroups> drawGroups,
-    std::unordered_map<std::string, Block*> blockDefs,
-    std::unordered_map<std::string, ItemDef*> itemDefs,
+    std::unordered_map<std::string, std::unique_ptr<Block>> blockDefs,
+    std::unordered_map<std::string, std::unique_ptr<ItemDef>> itemDefs,
     std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>> packs,
-    std::unordered_map<std::string, BlockMaterial> blockMaterials
-) : blockDefs(blockDefs),
-    itemDefs(itemDefs),
-    indices(indices),
+    std::unordered_map<std::string, std::unique_ptr<BlockMaterial>> blockMaterials
+) : blockDefs(std::move(blockDefs)),
+    itemDefs(std::move(itemDefs)),
+    indices(std::move(indices)),
     packs(std::move(packs)),
     blockMaterials(std::move(blockMaterials)),
     drawGroups(std::move(drawGroups)) 
 {}
 
 Content::~Content() {
-    for (auto& entry : blockDefs) {
-        delete entry.second;
-    }
-    for (auto& entry : itemDefs) {
-        delete entry.second;
-    }
 }
 
 Block* Content::findBlock(std::string id) const {
@@ -167,7 +40,7 @@ Block* Content::findBlock(std::string id) const {
     if (found == blockDefs.end()) {
         return nullptr;
     }
-    return found->second;
+    return found->second.get();
 }
 
 Block& Content::requireBlock(std::string id) const {
@@ -183,7 +56,7 @@ ItemDef* Content::findItem(std::string id) const {
     if (found == itemDefs.end()) {
         return nullptr;
     }
-    return found->second;
+    return found->second.get();
 }
 
 ItemDef& Content::requireItem(std::string id) const {
@@ -199,7 +72,7 @@ const BlockMaterial* Content::findBlockMaterial(std::string id) const {
     if (found == blockMaterials.end()) {
         return nullptr;
     }
-    return &found->second;
+    return found->second.get();
 }
 
 const ContentPackRuntime* Content::getPackRuntime(std::string id) const {
@@ -210,7 +83,7 @@ const ContentPackRuntime* Content::getPackRuntime(std::string id) const {
     return found->second.get();
 }
 
-const std::unordered_map<std::string, BlockMaterial>& Content::getBlockMaterials() const {
+const std::unordered_map<std::string, std::unique_ptr<BlockMaterial>>& Content::getBlockMaterials() const {
     return blockMaterials;
 }
 
diff --git a/src/content/Content.hpp b/src/content/Content.hpp
index dcf3c56f..c9df8417 100644
--- a/src/content/Content.hpp
+++ b/src/content/Content.hpp
@@ -1,17 +1,19 @@
 #ifndef CONTENT_CONTENT_HPP_
 #define CONTENT_CONTENT_HPP_
 
+#include "../typedefs.hpp"
+
 #include <string>
 #include <vector>
 #include <memory>
 #include <stdexcept>
 #include <unordered_map>
 #include <set>
-#include "../typedefs.hpp"
-#include "../voxels/Block.hpp"
 
 using DrawGroups = std::set<ubyte>;
 
+class Block;
+struct BlockMaterial;
 class ItemDef;
 class Content;
 class ContentPackRuntime;
@@ -41,33 +43,6 @@ public:
     }
 };
 
-class ContentBuilder {
-    std::unordered_map<std::string, Block*> blockDefs;
-    std::vector<std::string> blockIds;
-
-    std::unordered_map<std::string, ItemDef*> itemDefs;
-    std::vector<std::string> itemIds;
-
-    std::unordered_map<std::string, BlockMaterial> blockMaterials;
-
-    std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>> packs;
-public:
-    ~ContentBuilder();
-
-    void add(Block* def);
-    void add(ItemDef* def);
-    void add(ContentPackRuntime* pack);
-    void add(BlockMaterial material);
-
-    Block& createBlock(std::string id);
-    ItemDef& createItem(std::string id);
-
-    void checkIdentifier(std::string id);
-    contenttype checkContentType(std::string id);
-
-    Content* build();
-};
-
 /// @brief Runtime defs cache: indices
 class ContentIndices {
     std::vector<Block*> blockDefs;
@@ -110,21 +85,21 @@ public:
 
 /* Content is a definitions repository */
 class Content {
-    std::unordered_map<std::string, Block*> blockDefs;
-    std::unordered_map<std::string, ItemDef*> itemDefs;
+    std::unordered_map<std::string, std::unique_ptr<Block>> blockDefs;
+    std::unordered_map<std::string, std::unique_ptr<ItemDef>> itemDefs;
     std::unique_ptr<ContentIndices> indices;
     std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>> packs;
-    std::unordered_map<std::string, BlockMaterial> blockMaterials;
+    std::unordered_map<std::string, std::unique_ptr<BlockMaterial>> blockMaterials;
 public:
     std::unique_ptr<DrawGroups> const drawGroups;
 
     Content(
-        ContentIndices* indices, 
+        std::unique_ptr<ContentIndices> indices, 
         std::unique_ptr<DrawGroups> drawGroups,
-        std::unordered_map<std::string, Block*> blockDefs,
-        std::unordered_map<std::string, ItemDef*> itemDefs,
+        std::unordered_map<std::string, std::unique_ptr<Block>> blockDefs,
+        std::unordered_map<std::string, std::unique_ptr<ItemDef>> itemDefs,
         std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>> packs,
-        std::unordered_map<std::string, BlockMaterial> blockMaterials
+        std::unordered_map<std::string, std::unique_ptr<BlockMaterial>> blockMaterials
     );
     ~Content();
 
@@ -142,7 +117,7 @@ public:
 
     const ContentPackRuntime* getPackRuntime(std::string id) const;
 
-    const std::unordered_map<std::string, BlockMaterial>& getBlockMaterials() const;
+    const std::unordered_map<std::string, std::unique_ptr<BlockMaterial>>& getBlockMaterials() const;
     const std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>>& getPacks() const;
 };
 
diff --git a/src/content/ContentBuilder.cpp b/src/content/ContentBuilder.cpp
new file mode 100644
index 00000000..16ec0a85
--- /dev/null
+++ b/src/content/ContentBuilder.cpp
@@ -0,0 +1,109 @@
+#include "ContentBuilder.hpp"
+
+ContentBuilder::~ContentBuilder() {}
+
+void ContentBuilder::add(std::unique_ptr<ContentPackRuntime> pack) {
+    packs[pack->getId()] = std::move(pack);
+}
+
+Block& ContentBuilder::createBlock(std::string id) {
+    auto found = blockDefs.find(id);
+    if (found != blockDefs.end()) {
+        return *found->second;
+    }
+    checkIdentifier(id);
+    blockIds.push_back(id);
+    blockDefs[id] = std::make_unique<Block>(id);
+    return *blockDefs[id];
+}
+
+ItemDef& ContentBuilder::createItem(std::string id) {
+    auto found = itemDefs.find(id);
+    if (found != itemDefs.end()) {
+        return *found->second;
+    }
+    checkIdentifier(id);
+    itemIds.push_back(id);
+    itemDefs[id] = std::make_unique<ItemDef>(id);
+    return *itemDefs[id];
+}
+
+BlockMaterial& ContentBuilder::createBlockMaterial(std::string id) {
+    blockMaterials[id] = std::make_unique<BlockMaterial>();
+    auto& material = *blockMaterials[id];
+    material.name = id;
+    return material;
+}
+
+void ContentBuilder::checkIdentifier(std::string id) {
+    contenttype result;
+    if (((result = checkContentType(id)) != contenttype::none)) {
+        throw namereuse_error("name "+id+" is already used", result);
+    }  
+}
+
+contenttype ContentBuilder::checkContentType(std::string id) {
+    if (blockDefs.find(id) != blockDefs.end()) {
+        return contenttype::block;
+    }
+    if (itemDefs.find(id) != itemDefs.end()) {
+        return contenttype::item;
+    }
+    return contenttype::none;
+}
+
+std::unique_ptr<Content> ContentBuilder::build() {
+    std::vector<Block*> blockDefsIndices;
+    auto groups = std::make_unique<DrawGroups>();
+    for (const std::string& name : blockIds) {
+        Block& def = *blockDefs[name];
+        
+        // Generating runtime info
+        def.rt.id = blockDefsIndices.size();
+        def.rt.emissive = *reinterpret_cast<uint32_t*>(def.emission);
+        def.rt.solid = def.model == BlockModel::block;
+
+        if (def.rotatable) {
+            for (uint i = 0; i < BlockRotProfile::MAX_COUNT; i++) {
+                def.rt.hitboxes[i].reserve(def.hitboxes.size());
+                for (AABB& aabb : def.hitboxes) {
+                    def.rotations.variants[i].transform(aabb);
+                    def.rt.hitboxes[i].push_back(aabb);
+                }
+            }
+        }
+
+        blockDefsIndices.push_back(&def);
+        groups->insert(def.drawGroup);
+    }
+
+    std::vector<ItemDef*> itemDefsIndices;
+    for (const std::string& name : itemIds) {
+        ItemDef& def = *itemDefs[name];
+        
+        // Generating runtime info
+        def.rt.id = itemDefsIndices.size();
+        def.rt.emissive = *reinterpret_cast<uint32_t*>(def.emission);
+        itemDefsIndices.push_back(&def);
+    }
+
+    auto content = std::make_unique<Content>(
+        std::make_unique<ContentIndices>(blockDefsIndices, itemDefsIndices), 
+        std::move(groups), 
+        std::move(blockDefs), 
+        std::move(itemDefs), 
+        std::move(packs), 
+        std::move(blockMaterials)
+    );
+
+    // Now, it's time to resolve foreign keys
+    for (Block* def : blockDefsIndices) {
+        def->rt.pickingItem = content->requireItem(def->pickingItem).rt.id;
+    }
+
+    for (ItemDef* def : itemDefsIndices) {
+        def->rt.placingBlock = content->requireBlock(def->placingBlock).rt.id;
+    }
+
+    return content;
+}
diff --git a/src/content/ContentBuilder.hpp b/src/content/ContentBuilder.hpp
new file mode 100644
index 00000000..f6bcbd5e
--- /dev/null
+++ b/src/content/ContentBuilder.hpp
@@ -0,0 +1,37 @@
+#ifndef CONTENT_CONTENT_BUILDER_HPP_
+#define CONTENT_CONTENT_BUILDER_HPP_
+
+#include "../items/ItemDef.hpp"
+#include "../voxels/Block.hpp"
+#include "../content/Content.hpp"
+#include "../content/ContentPack.hpp"
+
+#include <memory>
+#include <vector>
+#include <unordered_map>
+
+class ContentBuilder {
+    std::unordered_map<std::string, std::unique_ptr<Block>> blockDefs;
+    std::vector<std::string> blockIds;
+
+    std::unordered_map<std::string, std::unique_ptr<ItemDef>> itemDefs;
+    std::vector<std::string> itemIds;
+
+    std::unordered_map<std::string, std::unique_ptr<BlockMaterial>> blockMaterials;
+    std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>> packs;
+public:
+    ~ContentBuilder();
+
+    void add(std::unique_ptr<ContentPackRuntime> pack);
+
+    Block& createBlock(std::string id);
+    ItemDef& createItem(std::string id);
+    BlockMaterial& createBlockMaterial(std::string id);
+
+    void checkIdentifier(std::string id);
+    contenttype checkContentType(std::string id);
+
+    std::unique_ptr<Content> build();
+};
+
+#endif // CONTENT_CONTENT_BUILDER_HPP_
diff --git a/src/content/ContentLoader.cpp b/src/content/ContentLoader.cpp
index 9878d9ef..36a7efa8 100644
--- a/src/content/ContentLoader.cpp
+++ b/src/content/ContentLoader.cpp
@@ -2,6 +2,7 @@
 
 #include "Content.hpp"
 #include "ContentPack.hpp"
+#include "ContentBuilder.hpp"
 #include "../coders/json.hpp"
 #include "../core_defs.hpp"
 #include "../data/dynamic.hpp"
@@ -26,9 +27,11 @@ static debug::Logger logger("content-loader");
 ContentLoader::ContentLoader(ContentPack* pack) : pack(pack) {
 }
 
-bool ContentLoader::fixPackIndices(fs::path folder, 
-                                   dynamic::Map* indicesRoot,
-                                   std::string contentSection) {
+bool ContentLoader::fixPackIndices(
+    fs::path folder, 
+    dynamic::Map* indicesRoot,
+    std::string contentSection
+) {
     std::vector<std::string> detected;
     std::vector<std::string> indexed;
     if (fs::is_directory(folder)) {
@@ -312,22 +315,22 @@ void ContentLoader::loadItem(ItemDef& def, std::string full, std::string name) {
     }
 }
 
-BlockMaterial ContentLoader::loadBlockMaterial(fs::path file, std::string full) {
+void ContentLoader::loadBlockMaterial(BlockMaterial& def, fs::path file) {
     auto root = files::read_json(file);
-    BlockMaterial material {full};
-    root->str("steps-sound", material.stepsSound);
-    root->str("place-sound", material.placeSound);
-    root->str("break-sound", material.breakSound);
-    return material;
+    root->str("steps-sound", def.stepsSound);
+    root->str("place-sound", def.placeSound);
+    root->str("break-sound", def.breakSound);
 }
 
 void ContentLoader::load(ContentBuilder& builder) {
     logger.info() << "loading pack [" << pack->id << "]";
 
-    auto runtime = new ContentPackRuntime(*pack, scripting::create_pack_environment(*pack));
-    builder.add(runtime);
+    auto runtime = std::make_unique<ContentPackRuntime>(
+        *pack, scripting::create_pack_environment(*pack)
+    );
     env = runtime->getEnvironment();
     ContentPackStats& stats = runtime->getStatsWriteable();
+    builder.add(std::move(runtime));
 
     fixPackIndices();
 
@@ -388,7 +391,7 @@ void ContentLoader::load(ContentBuilder& builder) {
         for (auto entry : fs::directory_iterator(materialsDir)) {
             fs::path file = entry.path();
             std::string name = pack->id+":"+file.stem().u8string();
-            builder.add(loadBlockMaterial(file, name));
+            loadBlockMaterial(builder.createBlockMaterial(name), file);
         }
     }
 }
diff --git a/src/content/ContentLoader.hpp b/src/content/ContentLoader.hpp
index d709f0d0..515d742a 100644
--- a/src/content/ContentLoader.hpp
+++ b/src/content/ContentLoader.hpp
@@ -1,13 +1,15 @@
 #ifndef CONTENT_CONTENT_LOADER_HPP_
 #define CONTENT_CONTENT_LOADER_HPP_
 
-#include "../voxels/Block.hpp"
+#include "../typedefs.hpp"
 
 #include <string>
 #include <filesystem>
 
 namespace fs = std::filesystem;
 
+class Block;
+struct BlockMaterial;
 class ItemDef;
 struct ContentPack;
 class ContentBuilder;
@@ -23,7 +25,7 @@ class ContentLoader {
     void loadBlock(Block& def, std::string full, std::string name);
     void loadCustomBlockModel(Block& def, dynamic::Map* primitives);
     void loadItem(ItemDef& def, std::string full, std::string name);
-    BlockMaterial loadBlockMaterial(fs::path file, std::string full);
+    void loadBlockMaterial(BlockMaterial& def, fs::path file);
 public:
     ContentLoader(ContentPack* pack);
 
diff --git a/src/content/ContentPack.hpp b/src/content/ContentPack.hpp
index d8790b8b..e58fbd84 100644
--- a/src/content/ContentPack.hpp
+++ b/src/content/ContentPack.hpp
@@ -12,17 +12,11 @@ class EnginePaths;
 
 namespace fs = std::filesystem;
 
-namespace scripting {
-    class Environment;
-}
-
 class contentpack_error : public std::runtime_error {
     std::string packId;
     fs::path folder;
 public:
-    contentpack_error(std::string packId, 
-                      fs::path folder, 
-                      std::string message);
+    contentpack_error(std::string packId, fs::path folder, std::string message);
 
     std::string getPackId() const;
     fs::path getFolder() const;
diff --git a/src/core_defs.cpp b/src/core_defs.cpp
index 12e840b4..e0a4e6b0 100644
--- a/src/core_defs.cpp
+++ b/src/core_defs.cpp
@@ -2,6 +2,7 @@
 
 #include "items/ItemDef.hpp"
 #include "content/Content.hpp"
+#include "content/ContentBuilder.hpp"
 #include "window/Window.hpp"
 #include "window/Events.hpp"
 #include "window/input.hpp"
diff --git a/src/engine.cpp b/src/engine.cpp
index a903453e..a4b9f5bf 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -9,6 +9,7 @@
 #include "coders/imageio.hpp"
 #include "coders/json.hpp"
 #include "coders/toml.hpp"
+#include "content/ContentBuilder.hpp"
 #include "content/ContentLoader.hpp"
 #include "core_defs.hpp"
 #include "files/files.hpp"
@@ -273,7 +274,7 @@ void Engine::loadContent() {
         ContentLoader loader(&pack);
         loader.load(contentBuilder);
     }
-    content.reset(contentBuilder.build());
+    content = contentBuilder.build();
     resPaths = std::make_unique<ResPaths>(resdir, resRoots);
 
     langs::setup(resdir, langs::current->getId(), contentPacks);
diff --git a/src/frontend/screens/MenuScreen.cpp b/src/frontend/screens/MenuScreen.cpp
index 08d4f8a4..96b7656c 100644
--- a/src/frontend/screens/MenuScreen.cpp
+++ b/src/frontend/screens/MenuScreen.cpp
@@ -5,6 +5,7 @@
 #include "../../graphics/core/Batch2D.hpp"
 #include "../../graphics/core/Shader.hpp"
 #include "../../graphics/core/Texture.hpp"
+#include "../../maths/UVRegion.hpp"
 #include "../../window/Window.hpp"
 #include "../../window/Camera.hpp"
 #include "../../engine.hpp"