diff --git a/configure.py b/configure.py
index a62f1c8..f39dfca 100755
--- a/configure.py
+++ b/configure.py
@@ -105,10 +105,16 @@ parser.add_argument(
     action="store_true",
     help="print verbose output",
 )
+parser.add_argument(
+    "--non-matching",
+    dest="non_matching",
+    action="store_true",
+    help="builds equivalent (but non-matching) or modded objects",
+)
 args = parser.parse_args()
 
 config = ProjectConfig()
-config.version = args.version
+config.version = str(args.version)
 version_num = VERSIONS.index(config.version)
 
 # Apply arguments
@@ -118,6 +124,7 @@ config.binutils_path = args.binutils
 config.compilers_path = args.compilers
 config.debug = args.debug
 config.generate_map = args.map
+config.non_matching = args.non_matching
 config.sjiswrap_path = args.sjiswrap
 if not is_windows():
     config.wrapper = args.wrapper
@@ -146,6 +153,8 @@ config.ldflags = [
     "-nodefaults",
     # "-listclosure", # Uncomment for Wii linkers
 ]
+# Use for any additional files that should cause a re-configure when modified
+config.reconfig_deps = []
 
 # Base flags, common to most GC/Wii games.
 # Generally leave untouched, with overrides added below.
@@ -220,8 +229,9 @@ def Rel(lib_name: str, objects: List[Object]) -> Dict[str, Any]:
     }
 
 
-Matching = True
-NonMatching = False
+Matching = True                   # Object matches and should be linked
+NonMatching = False               # Object does not match and should not be linked
+Equivalent = config.non_matching  # Object should be linked when configured with --non-matching
 
 config.warn_missing_config = True
 config.warn_missing_source = False
diff --git a/tools/project.py b/tools/project.py
index bf61890..4e2263d 100644
--- a/tools/project.py
+++ b/tools/project.py
@@ -71,6 +71,7 @@ class ProjectConfig:
         self.sjiswrap_path: Optional[Path] = None  # If None, download
 
         # Project config
+        self.non_matching: bool = False
         self.build_rels: bool = True  # Build REL files
         self.check_sha_path: Optional[Path] = None  # Path to version.sha1
         self.config_path: Optional[Path] = None  # Path to config.yml
@@ -90,6 +91,9 @@ class ProjectConfig:
         self.shift_jis = (
             True  # Convert source files from UTF-8 to Shift JIS automatically
         )
+        self.reconfig_deps: Optional[List[Path]] = (
+            None  # Additional re-configuration dependency files
+        )
 
         # Progress output and progress.json config
         self.progress_all: bool = True  # Include combined "all" category
@@ -553,6 +557,7 @@ def generate_build_ninja(
                 )
             n.newline()
 
+    link_outputs: List[Path] = []
     if build_config:
         link_steps: List[LinkStep] = []
         used_compiler_versions: Set[str] = set()
@@ -760,6 +765,7 @@ def generate_build_ninja(
         ###
         for step in link_steps:
             step.write(n)
+            link_outputs.append(step.output())
         n.newline()
 
         ###
@@ -861,7 +867,7 @@ def generate_build_ninja(
             outputs=ok_path,
             rule="check",
             inputs=config.check_sha_path,
-            implicit=[dtk, *map(lambda step: step.output(), link_steps)],
+            implicit=[dtk, *link_outputs],
         )
         n.newline()
 
@@ -961,6 +967,7 @@ def generate_build_ninja(
             configure_script,
             python_lib,
             python_lib_dir / "ninja_syntax.py",
+            *(config.reconfig_deps or [])
         ],
     )
     n.newline()
@@ -970,7 +977,10 @@ def generate_build_ninja(
     ###
     n.comment("Default rule")
     if build_config:
-        n.default(progress_path)
+        if config.non_matching:
+            n.default(link_outputs)
+        else:
+            n.default(progress_path)
     else:
         n.default(build_config_path)