diff --git a/HISTORY.rst b/HISTORY.rst
index 2ed70050..b87270c6 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -19,6 +19,7 @@ PlatformIO Core 6
 ~~~~~~~~~~~~~~~~~~~
 
 * Resolved an issue that caused generated projects for `PlatformIO IDE for VSCode <https://docs.platformio.org/en/latest/integration/ide/vscode.html>`__ to break when the ``-iprefix`` compiler flag was used
+* Resolved an issue encountered while utilizing the `pio pkg exec <https://docs.platformio.org/en/latest/core/userguide/pkg/cmd_exec.html>`__ command on the Windows platform to execute Python scripts from a package
 
 6.1.9 (2023-07-06)
 ~~~~~~~~~~~~~~~~~~
diff --git a/platformio/package/commands/exec.py b/platformio/package/commands/exec.py
index fc100f19..41386d5e 100644
--- a/platformio/package/commands/exec.py
+++ b/platformio/package/commands/exec.py
@@ -20,7 +20,7 @@ import click
 from platformio.compat import IS_MACOS, IS_WINDOWS
 from platformio.exception import ReturnErrorCode, UserSideException
 from platformio.package.manager.tool import ToolPackageManager
-from platformio.proc import get_pythonexe_path
+from platformio.proc import get_pythonexe_path, where_is_program
 
 
 @click.command("exec", short_help="Run command from package tool")
@@ -52,9 +52,13 @@ def package_exec_cmd(obj, package, call, args):
 
     inject_pkg_to_environ(pkg)
     os.environ["PIO_PYTHON_EXE"] = get_pythonexe_path()
+
     # inject current python interpreter on Windows
-    if IS_WINDOWS and args and args[0].endswith(".py"):
+    if args[0].endswith(".py"):
         args = [os.environ["PIO_PYTHON_EXE"]] + list(args)
+        if not os.path.exists(args[1]):
+            args[1] = where_is_program(args[1])
+
     result = None
     try:
         run_options = dict(shell=call is not None, env=os.environ)
diff --git a/platformio/proc.py b/platformio/proc.py
index fb66bc7f..acfce4d9 100644
--- a/platformio/proc.py
+++ b/platformio/proc.py
@@ -185,10 +185,17 @@ def copy_pythonpath_to_osenv():
 
 
 def where_is_program(program, envpath=None):
-    env = os.environ
+    env = os.environ.copy()
     if envpath:
         env["PATH"] = envpath
 
+    # look up in $PATH
+    for bin_dir in env.get("PATH", "").split(os.pathsep):
+        if os.path.isfile(os.path.join(bin_dir, program)):
+            return os.path.join(bin_dir, program)
+        if IS_WINDOWS and os.path.isfile(os.path.join(bin_dir, "%s.exe" % program)):
+            return os.path.join(bin_dir, "%s.exe" % program)
+
     # try OS's built-in commands
     try:
         result = exec_command(["where" if IS_WINDOWS else "which", program], env=env)
@@ -197,13 +204,6 @@ def where_is_program(program, envpath=None):
     except OSError:
         pass
 
-    # look up in $PATH
-    for bin_dir in env.get("PATH", "").split(os.pathsep):
-        if os.path.isfile(os.path.join(bin_dir, program)):
-            return os.path.join(bin_dir, program)
-        if os.path.isfile(os.path.join(bin_dir, "%s.exe" % program)):
-            return os.path.join(bin_dir, "%s.exe" % program)
-
     return program