diff --git a/nhf/build.py b/nhf/build.py
index 7b2531d..4435508 100644
--- a/nhf/build.py
+++ b/nhf/build.py
@@ -42,14 +42,20 @@ class Target:
         self.kind = kind
         self.kwargs = kwargs
     def __str__(self):
-        return f"<target {self.name}>"
+        return f"<target {self.name}.{self.kind.ext} {self._method}>"
     def __call__(self, obj, *args, **kwargs):
         """
         Raw call function which passes arguments directly to `_method`
         """
         return self._method(obj, *args, **kwargs)
-    def file_name(self, file_name):
-        return f"{file_name}.{self.kind.ext}"
+
+    @property
+    def file_name(self):
+        """
+        Output file name
+        """
+        return f"{self.name}.{self.kind.ext}"
+
     def write_to(self, obj, path: str):
         x = self._method(obj)
         if self.kind == TargetKind.STL:
@@ -98,6 +104,8 @@ class Model:
     """
     Base class for a parametric assembly
     """
+    def __init__(self, name: str):
+        self.name = name
 
     @property
     def target_names(self) -> list[str]:
@@ -107,19 +115,22 @@ class Model:
         return list(Target.methods(self).keys())
 
     def check_all(self) -> int:
+        """
+        Builds all targets but do not output them
+        """
         total = 0
-        for k, f in Target.methods(self).items():
-            f(self)
+        for t in Target.methods(self).values():
+            t(self)
             total += 1
         return total
 
     def build_all(self, output_dir: Union[Path, str] = "build", verbose=1):
         """
-        Build all targets in this model
+        Build all targets in this model and write the results to file
         """
         output_dir = Path(output_dir)
-        for k, target in Target.methods(self).items():
-            output_file = output_dir / target.file_name(k)
+        for t in Target.methods(self).values():
+            output_file = output_dir / self.name / t.file_name
             if output_file.is_file():
                 if verbose >= 1:
                     print(f"{Fore.GREEN}Skipping{Style.RESET_ALL} {output_file}")
@@ -128,6 +139,10 @@ class Model:
 
             if verbose >= 1:
                 print(f"{Fore.BLUE}Building{Style.RESET_ALL} {output_file}")
-            target.write_to(self, str(output_file))
-            if verbose >= 1:
-                print(f"{Fore.GREEN}Built{Style.RESET_ALL} {output_file}")
+
+            try:
+                t.write_to(self, str(output_file))
+                if verbose >= 1:
+                    print(f"{Fore.GREEN}Built{Style.RESET_ALL} {output_file}")
+            except Exception as e:
+                print(f"{Fore.RED}Failed to build{Style.RESET_ALL} {output_file}: {e}")
diff --git a/nhf/touhou/houjuu_nue/__init__.py b/nhf/touhou/houjuu_nue/__init__.py
index 8f5679e..b90eb8c 100644
--- a/nhf/touhou/houjuu_nue/__init__.py
+++ b/nhf/touhou/houjuu_nue/__init__.py
@@ -109,6 +109,7 @@ class Parameters(Model):
     ))
 
     def __post_init__(self):
+        super().__init__(name="houjuu-nue")
         assert self.wing_root_radius > self.hs_hirth_joint.radius,\
             "Wing root must be large enough to accomodate joint"