diff --git a/main.cpp b/main.cpp
index edbf673..00556d4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -320,9 +320,17 @@ bool HeadersNeedRecompile(FileInfo file, std::filesystem::file_time_type object_
     return false;
 }
 
-bool MustRecompile(FileInfo file) {
-    std::string object_file = build_path + folder_char + std::filesystem::path(file.filename).stem().string() + ".o";
+std::string generate_object_file_name(std::string filename) {
+    std::filesystem::path cwd    = std::filesystem::weakly_canonical(std::filesystem::current_path());
+    std::filesystem::path target = std::filesystem::weakly_canonical(filename);
+    std::string out = std::filesystem::relative(target, cwd).replace_extension("o").generic_string();
+    for (char& c : out) if (c == folder_char[0]) c = '.';
+    return build_path + folder_char + out;
+}
 
+bool MustRecompile(FileInfo file) {
+    std::string object_file = generate_object_file_name(file.filename);
+    
     // si el objecte no existeix, fa falta recompilar
     if (!std::filesystem::exists(object_file)) {
         return true;
@@ -342,7 +350,7 @@ bool MustRecompile(FileInfo file) {
 }
 
 void Recompile(std::string source_file) {
-    std::string object_file = build_path + folder_char + std::filesystem::path(source_file).stem().string() + ".o";
+    std::string object_file = generate_object_file_name(source_file);
     must_link = true;
     std::string command = compiler + " " + source_file + " " + cppflags + " -c -o " + object_file;
     //std::cout << command << std::endl;
diff --git a/version.h b/version.h
index c6817ab..9856c92 100644
--- a/version.h
+++ b/version.h
@@ -1,3 +1,3 @@
 #pragma once
 
-#define LAGUEIRTO_VERSION "2.1.1"
+#define LAGUEIRTO_VERSION "2.1.2"