diff --git a/mypy_primer/model.py b/mypy_primer/model.py
index 0458435..a0b8116 100644
--- a/mypy_primer/model.py
+++ b/mypy_primer/model.py
@@ -27,6 +27,7 @@ class Project:
 
     mypy_cmd: str
     pyright_cmd: str | None
+    paths: list[str] | None = None
 
     install_cmd: str | None = None
     deps: list[str] | None = None
@@ -55,6 +56,8 @@ def __repr__(self) -> str:
             result += f", name_override={self.name_override!r}"
         if self.pyright_cmd:
             result += f", pyright_cmd={self.pyright_cmd!r}"
+        if self.paths:
+            result += f", paths={self.paths!r}"
         if self.install_cmd:
             result += f", install_cmd={self.install_cmd!r}"
         if self.deps:
@@ -168,7 +171,7 @@ async def setup(self) -> None:
     def get_mypy_cmd(self, mypy: str | Path, additional_flags: Sequence[str] = ()) -> str:
         mypy_cmd = self.mypy_cmd
         assert "{mypy}" in self.mypy_cmd
-        mypy_cmd = mypy_cmd.format(mypy=mypy)
+        mypy_cmd = mypy_cmd.format_map(_FormatMap(mypy=mypy, paths=self.paths))
 
         python_exe = self.venv.python
         mypy_cmd += f" --python-executable={quote_path(python_exe)}"
@@ -250,7 +253,11 @@ def get_pyright_cmd(self, pyright: Path, additional_flags: Sequence[str] = ()) -
         assert "{pyright}" in pyright_cmd
         if additional_flags:
             pyright_cmd += " " + " ".join(additional_flags)
-        pyright_cmd = pyright_cmd.format(pyright=f"node {pyright}")
+
+        pyright_cmd = pyright_cmd.format_map(
+            _FormatMap(pyright=f"node {pyright}", paths=self.paths)
+        )
+
         return pyright_cmd
 
     async def run_pyright(
@@ -345,6 +352,21 @@ def from_location(cls, location: str) -> Project:
         )
 
 
+class _FormatMap:
+    def __init__(self, **map: str | Path | list[str] | None) -> None:
+        self.map = map
+
+    def __getitem__(self, key: str) -> str | Path:
+        if key not in self.map:
+            raise KeyError(key)
+        value = self.map[key]
+        if value is None:
+            raise ValueError(f"Required {key} to be specified")
+        if isinstance(value, list):
+            value = " ".join(value)
+        return value
+
+
 @dataclass(frozen=True)
 class TypeCheckResult:
     command: str
diff --git a/mypy_primer/projects.py b/mypy_primer/projects.py
index 1be33bf..3ddb7b3 100644
--- a/mypy_primer/projects.py
+++ b/mypy_primer/projects.py
@@ -75,7 +75,8 @@ def get_projects() -> list[Project]:
         Project(
             location="https://github.com/python/mypy",
             mypy_cmd="{mypy} --config-file mypy_self_check.ini -p mypy -p mypyc",
-            pyright_cmd="{pyright} mypy mypyc",
+            pyright_cmd="{pyright} {paths}",
+            paths=["mypy", "mypyc"],
             deps=["pytest", "types-psutil", "types-setuptools", "filelock", "tomli"],
             expected_mypy_success=True,
             cost={"mypy": 15, "pyright": 50},
@@ -88,8 +89,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/psf/black",
-            mypy_cmd="{mypy} src",
-            pyright_cmd="{pyright} src",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src"],
             deps=["aiohttp", "click", "pathspec", "tomli", "platformdirs", "packaging"],
             expected_mypy_success=True,
         ),
@@ -108,8 +110,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/pandas-dev/pandas",
-            mypy_cmd="{mypy} pandas",
-            pyright_cmd="{pyright} pandas",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["pandas"],
             deps=[
                 "numpy",
                 "types-python-dateutil",
@@ -123,15 +126,17 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/pycqa/pylint",
-            mypy_cmd="{mypy} pylint/checkers --ignore-missing-imports",
-            pyright_cmd="{pyright} pylint/checkers",
+            mypy_cmd="{mypy} {paths} --ignore-missing-imports",
+            pyright_cmd="{pyright} {paths}",
+            paths=["pylint/checkers"],
             deps=["types-toml"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/aio-libs/aiohttp",
-            mypy_cmd="{mypy} aiohttp",
-            pyright_cmd="{pyright} aiohttp",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["aiohttp"],
             deps=["pytest"],
             install_cmd="AIOHTTP_NO_EXTENSIONS=1 {install} -e .",
             expected_mypy_success=True,
@@ -149,38 +154,43 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/sphinx-doc/sphinx",
-            mypy_cmd="{mypy} sphinx",
-            pyright_cmd="{pyright} sphinx",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["sphinx"],
             deps=["babel", "docutils-stubs", "types-requests", "packaging", "jinja2"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/scikit-learn/scikit-learn",
-            mypy_cmd="{mypy} sklearn",
-            pyright_cmd="{pyright} sklearn",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["sklearn"],
             deps=["joblib", "numpy", "scipy-stubs", "threadpoolctl"],
             expected_mypy_success=True,
             cost={"mypy": 15, "pyright": 240},
         ),
         Project(
             location="https://github.com/pypa/bandersnatch",
-            mypy_cmd="{mypy} src",
-            pyright_cmd="{pyright} src",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src"],
             deps=["types-filelock", "types-freezegun", "types-setuptools"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/hauntsaninja/boostedblob",
-            mypy_cmd="{mypy} boostedblob",
-            pyright_cmd="{pyright} boostedblob",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["boostedblob"],
             deps=["aiohttp", "uvloop", "pycryptodome"],
             expected_mypy_success=True,
             supported_platforms=["linux", "darwin"],
         ),
         Project(
             location="https://github.com/quora/asynq",
-            mypy_cmd="{mypy} asynq",
-            pyright_cmd="{pyright} asynq",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["asynq"],
             deps=["qcore"],
             expected_mypy_success=True,
         ),
@@ -193,15 +203,17 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/pypa/twine",
-            mypy_cmd="{mypy} twine",
-            pyright_cmd="{pyright} twine",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["twine"],
             deps=["keyring", "types-requests", "rich"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/more-itertools/more-itertools",
-            mypy_cmd="{mypy} more_itertools",
-            pyright_cmd="{pyright} more_itertools",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["more_itertools"],
             expected_mypy_success=True,
         ),
         Project(
@@ -246,8 +258,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/mystor/git-revise",
-            mypy_cmd="{mypy} gitrevise",
-            pyright_cmd="{pyright} gitrevise",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["gitrevise"],
             expected_mypy_success=True,
         ),
         Project(
@@ -259,8 +272,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/we-like-parsers/pegen",
-            mypy_cmd="{mypy} src/pegen",
-            pyright_cmd="{pyright} src/pegen",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src/pegen"],
             expected_mypy_success=True,
         ),
         Project(
@@ -297,8 +311,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/yelp/paasta",
-            mypy_cmd="{mypy} paasta_tools",
-            pyright_cmd="{pyright} paasta_tools",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["paasta_tools"],
             deps=[
                 "types-retry",
                 "types-tzlocal",
@@ -359,21 +374,24 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/pycqa/isort",
-            mypy_cmd="{mypy} --ignore-missing-imports isort",
-            pyright_cmd="{pyright} isort",
+            mypy_cmd="{mypy} --ignore-missing-imports {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["isort"],
             deps=["types-setuptools"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/aio-libs/aioredis",
-            mypy_cmd="{mypy} aioredis --ignore-missing-imports",
-            pyright_cmd="{pyright} aioredis",
+            mypy_cmd="{mypy} {paths} --ignore-missing-imports",
+            pyright_cmd="{pyright} {paths}",
+            paths=["aioredis"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/agronholm/anyio",
-            mypy_cmd="{mypy} src",
-            pyright_cmd="{pyright} src",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src"],
             expected_mypy_success=True,
         ),
         Project(
@@ -404,16 +422,18 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/google/jax",
-            mypy_cmd="{mypy} jax",
-            pyright_cmd="{pyright} jax",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["jax"],
             deps=["ml_dtypes", "numpy", "scipy-stubs", "types-requests"],
             expected_mypy_success=True,
             cost={"mypy": 30, "pyright": 90},
         ),
         Project(
             location="https://github.com/dulwich/dulwich",
-            mypy_cmd="{mypy} dulwich",
-            pyright_cmd="{pyright} dulwich",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["dulwich"],
             deps=["types-certifi", "types-paramiko"],
             expected_mypy_success=True,
         ),
@@ -445,8 +465,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/aiortc/aiortc",
-            mypy_cmd="{mypy} src",
-            pyright_cmd="{pyright} src",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src"],
             deps=["cryptography"],
             expected_mypy_success=True,
         ),
@@ -467,16 +488,18 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/schemathesis/schemathesis",
-            mypy_cmd="{mypy} src/schemathesis",
-            pyright_cmd="{pyright} src/schemathesis",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src/schemathesis"],
             deps=["attrs", "types-requests", "types-PyYAML", "hypothesis"],
             expected_mypy_success=True,
             supported_platforms=["linux", "darwin"],
         ),
         Project(
             location="https://github.com/graphql-python/graphql-core",
-            mypy_cmd="{mypy} src tests",
-            pyright_cmd="{pyright} src tests",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src", "tests"],
             expected_mypy_success=True,
             cost={"mypy": 40},
         ),
@@ -489,8 +512,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/niklasf/python-chess",
-            mypy_cmd="{mypy} --strict chess",
-            pyright_cmd="{pyright} chess",
+            mypy_cmd="{mypy} --strict {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["chess"],
             expected_mypy_success=True,
         ),
         Project(
@@ -510,8 +534,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/pypa/packaging",
-            mypy_cmd="{mypy} src",
-            pyright_cmd="{pyright} src",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src"],
             expected_mypy_success=True,
         ),
         Project(
@@ -555,15 +580,17 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/davidhalter/parso",
-            mypy_cmd="{mypy} parso",
-            pyright_cmd="{pyright} parso",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["parso"],
             expected_mypy_success=True,
             cost={"pyright": 75},
         ),
         Project(
             location="https://github.com/konradhalas/dacite",
-            mypy_cmd="{mypy} dacite",
-            pyright_cmd="{pyright} dacite",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["dacite"],
             expected_mypy_success=True,
         ),
         Project(
@@ -587,29 +614,33 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/jpadilla/pyjwt",
-            mypy_cmd="{mypy} jwt",
-            pyright_cmd="{pyright} jwt",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["jwt"],
             deps=["cryptography"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/apache/spark",
             mypy_cmd="{mypy} --config python/mypy.ini python/pyspark",
-            pyright_cmd="{pyright} python/pyspark",
+            pyright_cmd="{pyright} {paths}",
+            paths=["python/pyspark"],
             deps=["numpy"],
             expected_mypy_success=True,
             cost={"mypy": 20, "pyright": 110},
         ),
         Project(
             location="https://github.com/laowantong/paroxython",
-            mypy_cmd="{mypy} paroxython",
-            pyright_cmd="{pyright} paroxython",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["paroxython"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/Akuli/porcupine",
-            mypy_cmd="{mypy} --config-file= porcupine",
-            pyright_cmd="{pyright} porcupine",
+            mypy_cmd="{mypy} --config-file= {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["porcupine"],
             expected_mypy_success=True,
         ),
         Project(
@@ -652,8 +683,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/wntrblm/nox",
-            mypy_cmd="{mypy} nox",
-            pyright_cmd="{pyright} nox",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["nox"],
             deps=[
                 "jinja2",
                 "packaging",
@@ -695,8 +727,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/python-jsonschema/check-jsonschema",
-            mypy_cmd="{mypy} src",
-            pyright_cmd="{pyright} src",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src"],
             deps=["types-jsonschema", "types-requests"],
             expected_mypy_success=True,
         ),
@@ -740,8 +773,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/sympy/sympy",
-            mypy_cmd="{mypy} sympy",
-            pyright_cmd="{pyright} sympy",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["sympy"],
             deps=["mpmath"],
             expected_mypy_success=True,
             cost={"mypy": 35, "pyright": 240},
@@ -754,15 +788,17 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/PyCQA/flake8-pyi",
-            mypy_cmd="{mypy} pyi.py",
-            pyright_cmd="{pyright} pyi.py",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["pyi.py"],
             deps=["types-pyflakes"],
             expected_mypy_success=True,
         ),
         Project(
             location="https://github.com/internetarchive/openlibrary",
-            mypy_cmd="{mypy} openlibrary",
-            pyright_cmd="{pyright} openlibrary",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["openlibrary"],
             deps=[
                 "types-PyYAML",
                 "types-python-dateutil",
@@ -877,8 +913,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/home-assistant/core",
-            mypy_cmd="{mypy} homeassistant",
-            pyright_cmd="{pyright} homeassistant",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["homeassistant"],
             deps=[
                 "attrs",
                 "pydantic",
@@ -896,13 +933,15 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/kornia/kornia",
-            mypy_cmd="{mypy} kornia",
-            pyright_cmd="{pyright} kornia",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["kornia"],
         ),
         Project(
             location="https://github.com/ibis-project/ibis",
-            mypy_cmd="{mypy} --ignore-missing-imports ibis",
-            pyright_cmd="{pyright} ibis",
+            mypy_cmd="{mypy} --ignore-missing-imports {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["ibis"],
             deps=[
                 "SQLAlchemy",
                 "numpy",
@@ -938,8 +977,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/dragonchain/dragonchain",
-            mypy_cmd="{mypy} dragonchain --error-summary",
-            pyright_cmd="{pyright} dragonchain",
+            mypy_cmd="{mypy} {paths} --error-summary",
+            pyright_cmd="{pyright} {paths}",
+            paths=["dragonchain"],
             deps=["types-redis", "types-requests"],
         ),
         Project(
@@ -1042,8 +1082,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://gitlab.com/dkg/python-sop",
-            mypy_cmd="{mypy} --strict sop",
-            pyright_cmd="{pyright} sop",
+            mypy_cmd="{mypy} --strict {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["sop"],
         ),
         Project(
             location="https://github.com/Rapptz/discord.py",
@@ -1130,8 +1171,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/pyodide/pyodide",
-            mypy_cmd="{mypy} src pyodide-build --exclude 'setup.py|^src/tests|conftest.py'",
-            pyright_cmd="{pyright} src pyodide-build",
+            mypy_cmd="{mypy} {paths} --exclude 'setup.py|^src/tests|conftest.py'",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src", "pyodide-build"],
             deps=[
                 "packaging",
                 "types-docutils",
@@ -1181,8 +1223,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/Toufool/AutoSplit",
-            mypy_cmd="{mypy} src",
-            pyright_cmd="{pyright} src",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src"],
             deps=[
                 "certifi",
                 "ImageHash",
@@ -1249,8 +1292,9 @@ def get_projects() -> list[Project]:
         ),
         Project(
             location="https://github.com/python-trio/trio",
-            mypy_cmd="{mypy} src/trio",
-            pyright_cmd="{pyright} src/trio",
+            mypy_cmd="{mypy} {paths}",
+            pyright_cmd="{pyright} {paths}",
+            paths=["src/trio"],
             deps=[
                 "types-pyOpenSSL",
                 "types-cffi",