diff --git a/PyTeX/build/build/builder.py b/PyTeX/build/build/builder.py
index 4443bfc..3a00315 100644
--- a/PyTeX/build/build/builder.py
+++ b/PyTeX/build/build/builder.py
@@ -283,7 +283,7 @@ class PyTeXBuilder:
                     rel_path.name
                 ] = config
             for filename in source_file.output_files:
-                logger.verbose(f"[Built] {filename}")
+                logger.verbose(f"[Built] {self.target_root / filename.relative_path}")
             for output_file in source_file.output_files:
                 # TODO: handle this new config file
                 # TODO: handle git stuff / meta info stuff
diff --git a/PyTeX/build/build/pytex_config.py b/PyTeX/build/build/pytex_config.py
index 48e13f2..aa09483 100644
--- a/PyTeX/build/build/pytex_config.py
+++ b/PyTeX/build/build/pytex_config.py
@@ -3,7 +3,7 @@ from typing import Optional, Dict, List
 from PyTeX.build.build import BuildDirConfig
 from PyTeX.format.formatting_config import FormattingConfig
 from .constants import *
-from ...format.config import Config
+from ...format.config import Config, clean_dict
 
 
 class PyTeXConfig(Config):
@@ -45,7 +45,8 @@ class PyTeXConfig(Config):
         filled_content = self._fill_keys(content)
 
         build = filled_content[YAML_BUILD]
-        self._build_dir_specification = BuildDirConfig.from_json(build[YAML_DIRS])
+        cleaned_dirs = clean_dict(build[YAML_DIRS])
+        self._build_dir_specification = BuildDirConfig.from_json(cleaned_dirs) if cleaned_dirs else None
         self._recursive = build[YAML_RECURSIVE]
         self._clean_old_files = build[YAML_CLEAN_OLD_FILES]
         self._overwrite_existing_files = build[YAML_OVERWRITE_FILES]
diff --git a/PyTeX/format/dtx_formatter.py b/PyTeX/format/dtx_formatter.py
index 6d61a6d..e847201 100644
--- a/PyTeX/format/dtx_formatter.py
+++ b/PyTeX/format/dtx_formatter.py
@@ -16,7 +16,7 @@ class DTXFormatter(TexFormatter):
     def future_config(self) -> List[Tuple[str, FormattingConfig]]:
         config = FormattingConfig()
         config.tex_out_type = self.config.tex_out_type
-        return [(self.name + '.dtx', config)]
+        return [(self.name, config)]
 
     @property
     def output_files(self) -> List[str]:
diff --git a/main.py b/main.py
index 7ae2437..bae9e40 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,6 @@
 import signal
 import shutil
+import sys
 from pathlib import Path
 from PyTeX.build.build import PyTeXBuilder
 from PyTeX.build.build.pytex_config import PyTeXConfig
@@ -23,9 +24,11 @@ conf_path = Path('.pytexrc')
 
 builder = PyTeXBuilder(conf_path)
 
-builder.build_tex_sources()
 
-# builder.build_tex_files()
+if 'source' in sys.argv:
+    builder.build_tex_sources()
+if 'tex' in sys.argv:
+    builder.build_tex_files()
 
 
 pass