diff --git a/pyproject.toml b/pyproject.toml
index d606cd6ff..503041f4c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -79,6 +79,7 @@ exclude = "(?x)(^tests/.*/fixtures | ^src/poetry/core/_vendor)"
 [[tool.mypy.overrides]]
 module = [
   'jsonschema.*',
+  'lark.*',
   'setuptools.*',
   'tomlkit.*',
 ]
@@ -93,9 +94,6 @@ ignore_missing_imports = true
 [[tool.mypy.overrides]]
 module = [
   # src modules
-  'poetry.core.masonry.builders.builder',
-  'poetry.core.masonry.builders.sdist',
-  'poetry.core.masonry.builders.wheel',
   'poetry.core.packages.utils.utils',
   'poetry.core.packages.dependency',
   'poetry.core.packages.package',
diff --git a/src/poetry/core/masonry/api.py b/src/poetry/core/masonry/api.py
index 2ed4ed5f3..4850c1420 100644
--- a/src/poetry/core/masonry/api.py
+++ b/src/poetry/core/masonry/api.py
@@ -73,7 +73,7 @@ def build_sdist(
     """Builds an sdist, places it in sdist_directory"""
     poetry = Factory().create_poetry(Path(".").resolve(), with_groups=False)
 
-    path = SdistBuilder(poetry).build(Path(sdist_directory))
+    path = SdistBuilder(poetry, target_dir=Path(sdist_directory)).build()
 
     return path.name
 
diff --git a/src/poetry/core/masonry/builders/builder.py b/src/poetry/core/masonry/builders/builder.py
index 08c17b78c..aef1ddaea 100644
--- a/src/poetry/core/masonry/builders/builder.py
+++ b/src/poetry/core/masonry/builders/builder.py
@@ -32,8 +32,7 @@ class Builder:
     def __init__(
         self,
         poetry: Poetry,
-        ignore_packages_formats: bool = False,
-        executable: Path | str | None = None,
+        executable: Path | None = None,
     ) -> None:
         from poetry.core.masonry.metadata import Metadata
         from poetry.core.masonry.utils.module import Module
@@ -56,12 +55,7 @@ def __init__(
             if not isinstance(formats, list):
                 formats = [formats]
 
-            if (
-                formats
-                and self.format
-                and self.format not in formats
-                and not ignore_packages_formats
-            ):
+            if formats and self.format and self.format not in formats:
                 continue
 
             packages.append(p)
@@ -70,12 +64,7 @@ def __init__(
         for include in self._package.include:
             formats = include.get("format", [])
 
-            if (
-                formats
-                and self.format
-                and self.format not in formats
-                and not ignore_packages_formats
-            ):
+            if formats and self.format and self.format not in formats:
                 continue
 
             includes.append(include)
@@ -93,7 +82,7 @@ def __init__(
     def executable(self) -> Path:
         return self._executable
 
-    def build(self) -> None:
+    def build(self) -> Path:
         raise NotImplementedError()
 
     def find_excluded_files(self, fmt: str | None = None) -> set[str]:
@@ -203,10 +192,6 @@ def find_files_to_add(self, exclude_build: bool = True) -> set[BuildIncludeFile]
                 if file.suffix == ".pyc":
                     continue
 
-                if file in to_add:
-                    # Skip duplicates
-                    continue
-
                 logger.debug(f"Adding: {str(file)}")
                 to_add.add(include_file)
 
@@ -349,6 +334,8 @@ def convert_script_files(self) -> list[Path]:
     @classmethod
     def convert_author(cls, author: str) -> dict[str, str]:
         m = AUTHOR_REGEX.match(author)
+        if m is None:
+            raise RuntimeError(f"{author} does not match regex")
 
         name = m.group("name")
         email = m.group("email")
@@ -378,14 +365,11 @@ def __init__(
 
         self.path = self.path.resolve()
 
-    def __eq__(self, other: BuildIncludeFile | Path) -> bool:
-        if hasattr(other, "path"):
-            return self.path == other.path
-
-        return self.path == other
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, BuildIncludeFile):
+            return False
 
-    def __ne__(self, other: BuildIncludeFile | Path) -> bool:
-        return not self.__eq__(other)
+        return self.path == other.path
 
     def __hash__(self) -> int:
         return hash(self.path)
diff --git a/src/poetry/core/masonry/builders/sdist.py b/src/poetry/core/masonry/builders/sdist.py
index 69a950343..7ae26d651 100644
--- a/src/poetry/core/masonry/builders/sdist.py
+++ b/src/poetry/core/masonry/builders/sdist.py
@@ -15,7 +15,7 @@
 from pprint import pformat
 from tarfile import TarInfo
 from typing import TYPE_CHECKING
-from typing import ContextManager
+from typing import Iterator
 
 from poetry.core.masonry.builders.builder import Builder
 from poetry.core.masonry.builders.builder import BuildIncludeFile
@@ -25,6 +25,7 @@
     from poetry.core.masonry.utils.package_include import PackageInclude
     from poetry.core.packages.dependency import Dependency
     from poetry.core.packages.project_package import ProjectPackage
+    from poetry.core.poetry import Poetry
 
 SETUP = """\
 # -*- coding: utf-8 -*-
@@ -55,10 +56,18 @@ class SdistBuilder(Builder):
 
     format = "sdist"
 
-    def build(self, target_dir: Path | None = None) -> Path:
+    def __init__(
+        self,
+        poetry: Poetry,
+        executable: Path | None = None,
+        target_dir: Path | None = None,
+    ) -> None:
+        super().__init__(poetry, executable=executable)
+        self._target_dir = target_dir
+
+    def build(self) -> Path:
         logger.info("Building <info>sdist</info>")
-        if target_dir is None:
-            target_dir = self._path / "dist"
+        target_dir = self._target_dir or self._path / "dist"
 
         if not target_dir.exists():
             target_dir.mkdir(parents=True)
@@ -113,7 +122,7 @@ def build_setup(self) -> bytes:
         from poetry.core.masonry.utils.package_include import PackageInclude
 
         before, extra, after = [], [], []
-        package_dir = {}
+        package_dir: dict[str, str] = {}
 
         # If we have a build script, use it
         if self._package.build_script:
@@ -213,7 +222,7 @@ def build_setup(self) -> bytes:
         ).encode()
 
     @contextmanager
-    def setup_py(self) -> ContextManager[Path]:
+    def setup_py(self) -> Iterator[Path]:
         setup = self._path / "setup.py"
         has_setup = setup.exists()
 
@@ -231,7 +240,9 @@ def setup_py(self) -> ContextManager[Path]:
     def build_pkg_info(self) -> bytes:
         return self.get_metadata_content().encode()
 
-    def find_packages(self, include: PackageInclude) -> tuple[str, list[str], dict]:
+    def find_packages(
+        self, include: PackageInclude
+    ) -> tuple[str | None, list[str], dict[str, list[str]]]:
         """
         Discover subpackages and data.
 
@@ -244,7 +255,7 @@ def find_packages(self, include: PackageInclude) -> tuple[str, list[str], dict]:
         base = str(include.elements[0].parent)
 
         pkg_name = include.package
-        pkg_data = defaultdict(list)
+        pkg_data: dict[str, list[str]] = defaultdict(list)
         # Undocumented distutils feature:
         # the empty string matches all package names
         pkg_data[""].append("*")
diff --git a/src/poetry/core/masonry/builders/wheel.py b/src/poetry/core/masonry/builders/wheel.py
index 34da6eceb..843d7c751 100644
--- a/src/poetry/core/masonry/builders/wheel.py
+++ b/src/poetry/core/masonry/builders/wheel.py
@@ -15,7 +15,7 @@
 from io import StringIO
 from pathlib import Path
 from typing import TYPE_CHECKING
-from typing import ContextManager
+from typing import Iterator
 from typing import TextIO
 
 from packaging.tags import sys_tags
@@ -51,12 +51,12 @@ def __init__(
         poetry: Poetry,
         target_dir: Path | None = None,
         original: Path | None = None,
-        executable: str | None = None,
+        executable: Path | None = None,
         editable: bool = False,
     ) -> None:
         super().__init__(poetry, executable=executable)
 
-        self._records = []
+        self._records: list[tuple[str, str, int]] = []
         self._original_path = self._path
         self._target_dir = target_dir or (self._poetry.file.parent / "dist")
         if original:
@@ -69,7 +69,7 @@ def make_in(
         poetry: Poetry,
         directory: Path | None = None,
         original: Path | None = None,
-        executable: str | None = None,
+        executable: Path | None = None,
         editable: bool = False,
     ) -> str:
         wb = WheelBuilder(
@@ -84,11 +84,11 @@ def make_in(
         return wb.wheel_filename
 
     @classmethod
-    def make(cls, poetry: Poetry, executable: str | None = None) -> None:
+    def make(cls, poetry: Poetry, executable: Path | None = None) -> None:
         """Build a wheel in the dist/ directory, and optionally upload it."""
         cls.make_in(poetry, executable=executable)
 
-    def build(self) -> None:
+    def build(self) -> Path:
         logger.info("Building wheel")
 
         dist_dir = self._target_dir
@@ -125,6 +125,7 @@ def build(self) -> None:
         shutil.move(temp_path, str(wheel_path))
 
         logger.info(f"Built {self.wheel_filename}")
+        return wheel_path
 
     def _add_pth(self, wheel: zipfile.ZipFile) -> None:
         paths = set()
@@ -168,14 +169,14 @@ def _build(self, wheel: zipfile.ZipFile) -> None:
                         os.chdir(current_path)
 
                     build_dir = self._path / "build"
-                    lib = list(build_dir.glob("lib.*"))
-                    if not lib:
+                    libs: list[Path] = list(build_dir.glob("lib.*"))
+                    if not libs:
                         # The result of building the extensions
                         # does not exist, this may due to conditional
                         # builds, so we assume that it's okay
                         return
 
-                    lib = lib[0]
+                    lib = libs[0]
 
                     for pkg in lib.glob("**/*"):
                         if pkg.is_dir() or self.is_excluded(pkg):
@@ -298,8 +299,8 @@ def dist_info_name(self, distribution: str, version: str) -> str:
     @property
     def tag(self) -> str:
         if self._package.build_script:
-            tag = next(sys_tags())
-            tag = (tag.interpreter, tag.abi, tag.platform)
+            sys_tag = next(sys_tags())
+            tag = (sys_tag.interpreter, sys_tag.abi, sys_tag.platform)
         else:
             platform = "any"
             if self.supports_python2():
@@ -352,7 +353,7 @@ def _add_file(
     @contextlib.contextmanager
     def _write_to_zip(
         self, wheel: zipfile.ZipFile, rel_path: str
-    ) -> ContextManager[StringIO]:
+    ) -> Iterator[StringIO]:
         sio = StringIO()
         yield sio
 
diff --git a/src/poetry/core/masonry/metadata.py b/src/poetry/core/masonry/metadata.py
index ba6d2ef74..9e2530ae7 100644
--- a/src/poetry/core/masonry/metadata.py
+++ b/src/poetry/core/masonry/metadata.py
@@ -14,7 +14,7 @@ class Metadata:
     metadata_version = "2.1"
     # version 1.0
     name = None
-    version = None
+    version: str
     platforms = ()
     supported_platforms = ()
     summary = None
diff --git a/src/poetry/core/masonry/utils/package_include.py b/src/poetry/core/masonry/utils/package_include.py
index 66eecbe92..ecf7a2611 100644
--- a/src/poetry/core/masonry/utils/package_include.py
+++ b/src/poetry/core/masonry/utils/package_include.py
@@ -13,7 +13,7 @@ def __init__(
         formats: list[str] | None = None,
         source: str | None = None,
     ) -> None:
-        self._package: str | None = None
+        self._package: str
         self._is_package = False
         self._is_module = False
         self._source = source
@@ -25,7 +25,7 @@ def __init__(
         self.check_elements()
 
     @property
-    def package(self) -> str | None:
+    def package(self) -> str:
         return self._package
 
     @property