diff --git a/make-libs-list.c b/make-libs-list.c
index 74c0259..0d4a2da 100644
--- a/make-libs-list.c
+++ b/make-libs-list.c
@@ -4,7 +4,7 @@
 
 void usage();
 void info(cJSON *json);
-void generate_library_list(cJSON *input_json, cJSON *output_json);
+void generate_library_list(cJSON *input_json, cJSON *output_json, char output_system);
 
 int main(int argc, char const *argv[])
 {
@@ -30,7 +30,7 @@ int main(int argc, char const *argv[])
         cJSON *libraries = cJSON_CreateArray();
         cJSON_AddItemToObject(launcher_libraries, "libraries", libraries);
 
-        generate_library_list(json, launcher_libraries);
+        generate_library_list(json, launcher_libraries, argv[2][0]);
         int libraries_array_size = cJSON_GetArraySize(libraries);
 
         switch (argv[2][0])
@@ -49,7 +49,8 @@ int main(int argc, char const *argv[])
                 }
                 printf("%s", "%MC_DIR%/versions/%GAME_VERSION%/%GAME_VERSION%.jar");
                 break;
-            case 'u':
+            case 'l':
+            case 'x':
                 for (int i = 0; i < libraries_array_size; ++i)
                 {
                     cJSON *library = cJSON_GetArrayItem(libraries, i);
@@ -68,7 +69,7 @@ void usage()
     printf("%s\n\n", "Minecraft Libraries List Generator");
     printf("%s\n", "Usage:");
     printf("  %s\n\n", "make-libs-string <version.json> <system>");
-    printf("  %s\n\n", "<system> - w|u (windows or unix)");
+    printf("  %s\n\n", "<system> - w|l|x (windows or linux or osx)");
     printf("%s\n", "Other:");
     printf("  %s\n", "make-libs-string <version.json> s - to get info");
 }
@@ -83,12 +84,27 @@ void info(cJSON *json)
     printf("Minecraft libraries count: %d\n", libraries_array_size);
 }
 
-void generate_library_list(cJSON *input_json, cJSON *output_json)
+void generate_library_list(cJSON *input_json, cJSON *output_json, char output_system)
 {
     cJSON *input_libraries = cJSON_GetObjectItem(input_json, "libraries");
     cJSON *output_libraries = cJSON_GetObjectItem(output_json, "libraries");
     int libraries_array_size = cJSON_GetArraySize(input_libraries);
 
+    char *output_system_name;
+
+    switch (output_system)
+    {
+        case 'w':
+            output_system_name = "windows";
+            break;
+        case 'l':
+            output_system_name = "linux";
+            break;
+        case 'x':
+            output_system_name = "osx";
+            break;
+    }
+
     for (int i = 0; i < libraries_array_size; i++)
     {
         cJSON *library = cJSON_GetArrayItem(input_libraries, i);
@@ -98,9 +114,22 @@ void generate_library_list(cJSON *input_json, cJSON *output_json)
             cJSON *downloads = cJSON_GetObjectItem(library, "downloads");
             cJSON *artifact = cJSON_GetObjectItem(downloads, "artifact");
 
-            char *library_path = cJSON_GetStringValue(cJSON_GetObjectItem(artifact, "path"));
+            cJSON *rules = cJSON_GetObjectItem(library, "rules");
+            cJSON *rules_item = cJSON_GetArrayItem(rules, 0);
+            cJSON *os_type = cJSON_GetObjectItem(rules_item, "os");
+            char *os_name = cJSON_GetStringValue(cJSON_GetObjectItem(os_type, "name"));
 
-            cJSON_AddItemToArray(output_libraries, cJSON_CreateString(library_path));
+            if (os_name != 0) {
+                char *library_path = cJSON_GetStringValue(cJSON_GetObjectItem(artifact, "path"));
+
+                if (strcmp(output_system_name, os_name) == 0) {
+                    cJSON_AddItemToArray(output_libraries, cJSON_CreateString(library_path));
+                }
+            }
+            else {
+                char *library_path = cJSON_GetStringValue(cJSON_GetObjectItem(artifact, "path"));
+                cJSON_AddItemToArray(output_libraries, cJSON_CreateString(library_path));
+            }
         }
     }
 }