1diff --git a/pyproj/datadir.py b/pyproj/datadir.py
2index df625fee..a2beb06c 100644
3--- a/pyproj/datadir.py
4+++ b/pyproj/datadir.py
5@@ -70,7 +70,7 @@ def get_data_dir() -> str:
6 global _VALIDATED_PROJ_DATA
7 if _VALIDATED_PROJ_DATA is not None:
8 return _VALIDATED_PROJ_DATA
9- internal_datadir = Path(__file__).absolute().parent / "proj_dir" / "share" / "proj"
10+ internal_datadir = Path("@proj@/share/proj")
11 proj_lib_dirs = os.environ.get("PROJ_DATA", os.environ.get("PROJ_LIB", ""))
12 prefix_datadir = Path(sys.prefix, "share", "proj")
13 conda_windows_prefix_datadir = Path(sys.prefix, "Library", "share", "proj")
14diff --git a/setup.py b/setup.py
15index 71fb52cd..7984a68a 100644
16--- a/setup.py
17+++ b/setup.py
18@@ -13,7 +13,7 @@ from setuptools import Extension, setup
19 PROJ_MIN_VERSION = parse_version("8.2.0")
20 CURRENT_FILE_PATH = Path(__file__).absolute().parent
21 BASE_INTERNAL_PROJ_DIR = Path("proj_dir")
22-INTERNAL_PROJ_DIR = CURRENT_FILE_PATH / "pyproj" / BASE_INTERNAL_PROJ_DIR
23+INTERNAL_PROJ_DIR = Path("@proj@")
24 PROJ_VERSION_SEARCH = re.compile(r".*Rel\.\s+(?P<version>\d+\.\d+\.\d+).*")
25
26
27@@ -163,7 +163,7 @@ def get_extension_modules():
28 # By default we'll try to get options PROJ_DIR or the local version of proj
29 proj_dir = get_proj_dir()
30 library_dirs = get_proj_libdirs(proj_dir)
31- include_dirs = get_proj_incdirs(proj_dir)
32+ include_dirs = get_proj_incdirs(Path("@projdev@"))
33
34 proj_version = get_proj_version(proj_dir)
35 check_proj_version(proj_version)
36diff --git a/test/test_cli.py b/test/test_cli.py
37index 7a696de7..1b9b777b 100644
38--- a/test/test_cli.py
39+++ b/test/test_cli.py
40@@ -14,7 +14,7 @@ from pyproj.sync import _load_grid_geojson
41 from test.conftest import grids_available, proj_env, tmp_chdir
42
43 PYPROJ_CLI_ENDPONTS = pytest.mark.parametrize(
44- "input_command", [["pyproj"], [sys.executable, "-m", "pyproj"]]
45+ "input_command", [[sys.executable, "-m", "pyproj"]]
46 )
47
48