diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 06b48a4..2b871b1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -7,6 +7,7 @@ set(SOURCES
     taskmanager.cpp
     download.cpp
     atomicmutex.cpp
+    source.cpp
 )
 
 set(HEADERS
@@ -17,6 +18,7 @@ set(HEADERS
     taskmanager.h
     download.h
     atomicmutex.h
+    source.h
 )
 
 target_sources(${PROJECT_NAME} PRIVATE ${SOURCES})
diff --git a/src/collection.cpp b/src/collection.cpp
index 093f821..9fe1df8 100644
--- a/src/collection.cpp
+++ b/src/collection.cpp
@@ -43,7 +43,7 @@ Collection::Collection(
     librariesPath = root->getLibrariesPath();
     std::lock_guard lock(mutex);
     while (pendingSources.size() > 0) {
-        std::string source = pendingSources.front();
+        Source source = pendingSources.front();
         pendingSources.pop();
         processSource(source);
     }
@@ -54,15 +54,15 @@ Collection::Collection(
     );
 }
 
-void Collection::addSource(const std::string& source) {
+void Collection::addSource(const Source& source) {
     std::lock_guard lock(mutex);
     std::pair<Sources::const_iterator, bool> result = knownSources.emplace(source);
     if (!result.second) {
-        major("Source " + source + " is already present, skipping as duplicate");
+        major("Source " + source.print() + " is already present, skipping as duplicate");
         return;
     }
 
-    debug("Adding source " + source);
+    debug("Adding source " + source.print());
     switch (root->getState()) {
         case Component::initial:
         case Component::reading:
@@ -78,69 +78,74 @@ void Collection::addSource(const std::string& source) {
     }
 }
 
-void Collection::processSource(const std::string& source) {
-    if (isRemote(source))
+void Collection::processSource(const Source& source) {
+    std::string path = source.getPath();
+    if (isRemote(path))
         queueDownload(source);
     else
-        queueRead(source, source);
+        queueRead(source, path);
 }
 
-void Collection::sourceDownaloded(const std::string& source, TaskManager::Error err) {
+void Collection::sourceDownaloded(const Source& source, TaskManager::Error err) {
     std::lock_guard lock(mutex);
 
     Downloads::const_iterator itr = downloadingSources.find(source);
     std::optional<std::filesystem::path> location = itr->second->getLocation();
     downloadingSources.erase(itr);
     if (err.has_value() || !location.has_value()) {
-        error("Coundn't download " + source + ": " + err.value()->what());
+        error("Coundn't download " + source.print() + ": " + err.value()->what());
         return;
     }
 
     queueRead(source, location.value());
 }
 
-void Collection::sourceRead(const std::string& source, TaskManager::Error err) {
+void Collection::sourceRead(const Source& source, TaskManager::Error err) {
     std::lock_guard lock(mutex);
 
     Components::iterator itr = readingSources.find(source);
     if (err.has_value()) {
-        error("Coundn't read " + source + ": " + err.value()->what());
+        error("Coundn't read " + source.print() + ": " + err.value()->what());
         readingSources.erase(itr);
         return;
     }
 
     if (!itr->second->successfullyRead()) {
-        error("Source " + source + " had an error during read process, canceling build of this component");
+        error("Source " + source.print() + " had an error during read process, canceling build of this component");
         readingSources.erase(itr);
         return;
     }
 
-    debug("Source " + source + " has been read, scheduling build");
+    debug("Source " + source.print() + " has been read, scheduling build");
     std::pair<Components::iterator, bool> res = buildingSources.emplace(source, std::move(itr->second));
     readingSources.erase(itr);
 
+    std::string tgt = target;
+    if (source.hasExplicitTarget())
+        tgt = source.getTarget();
+
     taskManager->queue(
-        std::bind(&Component::build, res.first->second.get(), destination/librariesPath, target, true),
+        std::bind(&Component::build, res.first->second.get(), destination/librariesPath, tgt, true),
         std::bind(&Collection::sourceBuilt, this, source, std::placeholders::_1)
     );
 }
 
-void Collection::sourceBuilt(const std::string& source, TaskManager::Error err) {
+void Collection::sourceBuilt(const Source& source, TaskManager::Error err) {
     std::lock_guard lock(mutex);
     Components::iterator itr = buildingSources.find(source);
     bool success = itr->second->successfullyBuilt();
     buildingSources.erase(itr);
     if (err.has_value()) {
-        error("Coundn't read " + source + ": " + err.value()->what());
+        error("Coundn't read " + source.print() + ": " + err.value()->what());
         return;
     }
 
     if (!success) {
-        error("Source " + source + " had an error during build process");
+        error("Source " + source.print() + " had an error during build process");
         return;
     }
 
-    debug("Source " + source + " has been built");
+    debug("Source " + source.print() + " has been built");
     successSources.emplace(source);
 }
 
@@ -161,12 +166,12 @@ bool Collection::isRemote(const std::string& source) {
     return std::regex_search(source, remote);
 }
 
-void Collection::queueDownload(const std::string& source) {
-    debug("Scheduling download of " + source);
+void Collection::queueDownload(const Source& source) {
+    debug("Scheduling download of " + source.print());
     std::pair<Downloads::iterator, bool> res = downloadingSources.emplace(std::piecewise_construct,
         std::forward_as_tuple(source),
         std::forward_as_tuple(
-            std::make_unique<Download>(source, destination/downloads, logger)
+            std::make_unique<Download>(source.getPath(), destination/downloads, logger)
         )
     );
 
@@ -176,12 +181,12 @@ void Collection::queueDownload(const std::string& source) {
     );
 }
 
-void Collection::queueRead(const std::string& source, const std::filesystem::path& location) {
-    debug("Scheduling read of " + source);
+void Collection::queueRead(const Source& source, const std::filesystem::path& location) {
+    debug("Scheduling read of " + source.print());
     std::pair<Components::iterator, bool> res = readingSources.emplace(std::piecewise_construct,
         std::forward_as_tuple(source),
         std::forward_as_tuple(
-            std::make_unique<Component>(location, this, logger)
+            std::make_unique<Component>(location, this, logger, source.getOptionalName())
         )
     );
 
@@ -191,7 +196,7 @@ void Collection::queueRead(const std::string& source, const std::filesystem::pat
     );
 }
 
-bool Collection::hasSource(const std::string& source) const {
+bool Collection::hasSource(const Source& source) const {
     std::lock_guard lock(mutex);
     return _hasSource(source);
 }
@@ -221,7 +226,7 @@ bool Collection::success() const {
     return _sourcesTotal() == _sourcesSuccess() && root->successfullyBuilt();
 }
 
-bool Collection::_hasSource(const std::string& source) const {
+bool Collection::_hasSource(const Source& source) const {
     return knownSources.count(source) > 0;
 }
 
diff --git a/src/collection.h b/src/collection.h
index 970b94e..732e6ff 100644
--- a/src/collection.h
+++ b/src/collection.h
@@ -14,12 +14,13 @@
 #include "component.h"
 #include "download.h"
 #include "taskmanager.h"
+#include "source.h"
 
 class Collection : protected Loggable {
-    using Sources = std::set<std::string>;
-    using SourcesQueue = std::queue<std::string>;
-    using Downloads = std::map<std::string, std::unique_ptr<Download>>;
-    using Components = std::map<std::string, std::unique_ptr<Component>>;
+    using Sources = std::set<Source>;
+    using SourcesQueue = std::queue<Source>;
+    using Downloads = std::map<Source, std::unique_ptr<Download>>;
+    using Components = std::map<Source, std::unique_ptr<Component>>;
 
 public:
     Collection(
@@ -37,22 +38,22 @@ public:
     unsigned int sourcesError() const;
     unsigned int sourcesSuccess() const;
 
-    bool hasSource(const std::string& source) const;
-    void addSource(const std::string& source);
+    bool hasSource(const Source& source) const;
+    void addSource(const Source& source);
 
 private:
-    void sourceDownaloded(const std::string& source, TaskManager::Error err);
-    void sourceRead(const std::string& source, TaskManager::Error err);
-    void sourceBuilt(const std::string& source, TaskManager::Error err);
+    void sourceDownaloded(const Source& source, TaskManager::Error err);
+    void sourceRead(const Source& source, TaskManager::Error err);
+    void sourceBuilt(const Source& source, TaskManager::Error err);
     void rootBuilt(TaskManager::Error err);
 
     static bool isRemote(const std::string& source);
 
-    void processSource(const std::string& source);
-    void queueDownload(const std::string& source);
-    void queueRead(const std::string& source, const std::filesystem::path& location);
+    void processSource(const Source& source);
+    void queueDownload(const Source& source);
+    void queueRead(const Source& source, const std::filesystem::path& location);
 
-    bool _hasSource(const std::string& source) const;
+    bool _hasSource(const Source& source) const;
     unsigned int _sourcesTotal() const;
     unsigned int _sourcesPending() const;
     unsigned int _sourcesError() const;
diff --git a/src/component.cpp b/src/component.cpp
index cde13e5..db41587 100644
--- a/src/component.cpp
+++ b/src/component.cpp
@@ -42,7 +42,7 @@ Component::Component(
     const std::filesystem::path& path,
     Collection* collection,
     const std::shared_ptr<Logger>& logger,
-    const std::string& name
+    const std::optional<std::string>& name
 ):
     Loggable(logger),
     state(initial),
@@ -64,14 +64,14 @@ void Component::read() {
         case std::filesystem::file_type::directory:
             type = directory;
             state = ready;
-            if (!tryReadingBuildScenarios() && name.empty())
+            if (!tryReadingBuildScenarios() && !name.has_value())
                 name = location.filename();
 
             break;
         case std::filesystem::file_type::regular:
             type = file;
             state = ready;
-            if (name.empty())
+            if (!name.has_value())
                 name = location.filename();
 
             break;
@@ -115,12 +115,12 @@ bool Component::readAsMason() {
                 return false;
         }
 
-        if (name.empty()) {
+        if (!name.has_value()) {
             std::optional<std::string> manifestName = tryStringValue(mnfst, "name");
             if (manifestName.has_value())
                 name = manifestName.value();
 
-            if (name.empty()) {
+            if (!name.has_value()) {
                 major("Couldn't define name of the project at " + location.string() + ", using directory name as project name");
                 name = location.filename();
             }
@@ -141,18 +141,14 @@ bool Component::readMasonDependencies(const nlohmann::json& deps, const std::str
     for (const nlohmann::json& dep : deps) {
         switch (dep.type()) {
             case nlohmann::json::value_t::string:
-                collection->addSource(dep);
+                collection->addSource({dep});
                 break;
             case nlohmann::json::value_t::object: {
-                nlohmann::json::const_iterator ditr = dep.find("path");
-                if (ditr == dep.end())
+                std::optional<std::string> path = tryStringValue(dep, "path");
+                if (!path.has_value())
                     return errorScenario(manifestPath + " object of unexpected format in dependecies");
 
-                nlohmann::json path = *ditr;
-                if (!path.is_string())
-                    return errorScenario(manifestPath + " object of unexpected format in dependecies");
-
-                collection->addSource(path);
+                collection->addSource({path.value(), tryStringValue(dep, "target"), tryStringValue(dep, "name")});
             }
                 break;
             default:
@@ -181,20 +177,20 @@ void Component::build(const std::filesystem::path& destination, const std::strin
     switch (type) {
         case file:
             if (useName)
-                buildAsFile(destination/name);
+                buildAsFile(destination/name.value());
             else
                 buildAsFile(destination);
 
             break;
         case directory:
             if (useName)
-                buildAsDirectory(destination/name);
+                buildAsDirectory(destination/name.value());
             else
                 buildAsDirectory(destination);
             break;
         case mason:
             if (useName)
-                buildAsMason(destination/name, target);
+                buildAsMason(destination/name.value(), target);
             else
                 buildAsMason(destination, target);
             break;
diff --git a/src/component.h b/src/component.h
index 23f394b..67d409c 100644
--- a/src/component.h
+++ b/src/component.h
@@ -41,7 +41,7 @@ public:
         const std::filesystem::path& path,
         Collection* collection,
         const std::shared_ptr<Logger>& logger,
-        const std::string& name = ""
+        const std::optional<std::string>& name = std::nullopt
     );
 
     Type getType() const;
@@ -84,7 +84,7 @@ private:
     Collection* collection;
     std::filesystem::path location;
     std::optional<nlohmann::json> manifest;
-    std::string name;
+    std::optional<std::string> name;
 };
 
 class Component::WrongState : public std::runtime_error {
diff --git a/src/main.cpp b/src/main.cpp
index 581a7de..4c7359f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -7,6 +7,7 @@
 int main(int argc, char *argv[]) {
     std::string firstArg;
     std::string secondArg;
+    std::string thirdArg;
     if (argc > 1)
         firstArg = argv[1];
     else
@@ -17,13 +18,18 @@ int main(int argc, char *argv[]) {
     else
         secondArg = "./";
 
+    if (argc > 3)
+        thirdArg = argv[3];
+    else
+        thirdArg = "";
 
-    std::shared_ptr<Logger> logger = std::make_shared<Logger>(Logger::Severity::debug);
+
+    std::shared_ptr<Logger> logger = std::make_shared<Logger>(Logger::Severity::info);
     std::shared_ptr<TaskManager> taskManager = std::make_shared<TaskManager>(logger);
     std::shared_ptr<Collection> collection = std::make_shared<Collection>(
         firstArg,
         secondArg,
-        "",
+        thirdArg,
         logger,
         taskManager
     );
diff --git a/src/source.cpp b/src/source.cpp
new file mode 100644
index 0000000..a338772
--- /dev/null
+++ b/src/source.cpp
@@ -0,0 +1,129 @@
+#include "source.h"
+
+Source::Source(const std::string& path) :
+    path(path),
+    target(std::nullopt),
+    name(std::nullopt)
+{}
+
+Source::Source(const std::string& path, const std::string& target) :
+    path(path),
+    target(target),
+    name(std::nullopt)
+{}
+
+Source::Source(const std::string& path, const std::string& target, const std::string& name) :
+    path(path),
+    target(target),
+    name(name)
+{}
+
+Source::Source(const std::string& path, const std::optional<std::string>& target, const std::optional<std::string>& name) :
+    path(path),
+    target(target),
+    name(name)
+{}
+
+void Source::clearName() {
+    name = std::nullopt;
+}
+
+void Source::clearTarget() {
+    target = std::nullopt;
+}
+
+std::string Source::getPath() const {
+    return path;
+}
+
+std::string Source::getTarget() const {
+    if (target.has_value())
+        return target.value();
+    else
+        return "";
+}
+
+std::string Source::getName() const {
+    if (name.has_value())
+        return name.value();
+    else
+        return "";
+}
+
+std::optional<std::string> Source::getOptionalTarget() const {
+    return target;
+}
+
+std::optional<std::string> Source::getOptionalName() const {
+    return name;
+}
+
+bool Source::hasExplicitTarget() const {
+    return target.has_value();
+}
+
+bool Source::hasExplicitName() const {
+    return name.has_value();
+}
+
+void Source::setPath(const std::string& path) {
+    Source::path = path;
+}
+
+void Source::setTarget(const std::string& target) {
+    Source::target = target;
+}
+
+void Source::setName(const std::string& name) {
+    Source::name = name;
+}
+
+bool Source::operator < (const Source& other) const {
+    if (path < other.path)
+        return true;
+    else if (path > other.path)
+        return false;
+    else {
+        if (hasExplicitTarget()) {
+            if (other.hasExplicitTarget()) {
+                if (target.value() < other.target.value())
+                    return true;
+                else if (target.value() > other.target.value()) {
+                    return false;
+                } else {
+                    if (hasExplicitName()) {
+                        if (other.hasExplicitName()) {
+                            return name.value() < other.name.value();
+                        } else
+                            return false;
+                    } else
+                        return other.hasExplicitName();
+                }
+            } else
+                return false;
+        } else {
+            if (other.hasExplicitTarget())
+                return true;
+            else {
+                if (hasExplicitName()) {
+                    if (other.hasExplicitName()) {
+                        return name.value() < other.name.value();
+                    } else
+                        return false;
+                } else
+                    return other.hasExplicitName();
+            }
+        }
+    }
+}
+
+std::string Source::print() const {
+    std::string result = path;
+    if (hasExplicitTarget())
+        result += " -> " + target.value();
+
+    if (hasExplicitName())
+        result += " (as " + name.value() + ")";
+
+    return result;
+}
diff --git a/src/source.h b/src/source.h
new file mode 100644
index 0000000..5ea2652
--- /dev/null
+++ b/src/source.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <optional>
+#include <string>
+
+class Source {
+public:
+    Source(const std::string& path);
+    Source(const std::string& path, const std::string& target);
+    Source(const std::string& path, const std::string& target, const std::string& name);
+    Source(const std::string& path, const std::optional<std::string>& target, const std::optional<std::string>& name);
+
+    std::string getPath() const;
+    std::string getTarget() const;
+    std::string getName() const;
+    std::optional<std::string> getOptionalTarget() const;
+    std::optional<std::string> getOptionalName() const;
+
+    void setPath(const std::string& path);
+    void setTarget(const std::string& target);
+    void setName(const std::string& name);
+
+    std::string print() const;
+
+    void clearTarget();
+    void clearName();
+
+    bool hasExplicitTarget() const;
+    bool hasExplicitName() const;
+
+    bool operator < (const Source& other) const;
+
+private:
+    std::string path;
+    std::optional<std::string> target;
+    std::optional<std::string> name;
+};
diff --git a/src/taskmanager.cpp b/src/taskmanager.cpp
index a13c5e2..ea9070c 100644
--- a/src/taskmanager.cpp
+++ b/src/taskmanager.cpp
@@ -95,8 +95,13 @@ void TaskManager::executeTask(const Task& task) const {
     try {
         task.first();
     } catch (const std::exception& e) {
-        if (task.second.has_value())
-            task.second.value()(&e);
+        if (task.second.has_value()) {
+            try {
+                task.second.value()(&e);
+            } catch (const std::exception& e) {
+                error(std::string("Uncaught exception: ") + e.what());
+            }
+        }
 
         return;
     }
diff --git a/test/mason.json b/test/mason.json
index 02ac87d..b83409f 100644
--- a/test/mason.json
+++ b/test/mason.json
@@ -10,7 +10,16 @@
             "path" : "https://nowhere/to/get.from"
         },
         "https://git.macaw.me/blue/mason/archive/main.tar.gz",
-        "https://git.macaw.me/blue/mason/raw/branch/main/src2/atomicmutex.h"
+        "https://git.macaw.me/blue/mason/raw/branch/main/src2/atomicmutex.h",
+        {
+            "path" : "https://git.macaw.me/blue/mason/raw/branch/main/src2/atomicmutex.h",
+            "name" : "changed.h"
+        },
+        {
+            "path" : "https://git.macaw.me/blue/mimicry.git",
+            "name" : "mimicryNode",
+            "target" : "node"
+        }
     ],
     "build": [
         "mason.json",