diff --git a/script/update-requirements b/script/update-requirements
index 452fd5d..2b5bcbb 100755
--- a/script/update-requirements
+++ b/script/update-requirements
@@ -11,8 +11,9 @@ TARGETS = ('', 'dev', 'docs')  # empty string is used for the base requirements
 FILE_HEADER = f'# DO NOT EDIT THIS FILE DIRECTLY - use {SCRIPT} to update\n'
 
 
-def print_packages(packages, heading):
+def print_packages(packages: list[str], heading: str, filename: str):
     print(f'{heading}:')
+    print(f'file={filename}:')
     print('  ', end='')
     print('\n  '.join(packages))
 
@@ -30,6 +31,7 @@ def get_package_name() -> str:
 
 
 def run_command(command: str) -> tuple[str, str, int]:
+    print(f"running command: '{command}'")
     try:
         proc = subprocess.run(
             command.split(),
@@ -39,45 +41,48 @@ def run_command(command: str) -> tuple[str, str, int]:
             timeout=30,
         )
     except Exception as exc:
-        print(f"can't run command='{command}'")
+        print(f"can't run command: '{command}'")
         raise exc
 
     return proc.stdout.strip(), proc.stderr.strip(), proc.returncode
 
 
-def save_base_reqs(our_package_name: str, tmpdir: str) -> list[str]:
-    print('installing base')
+def filter_output(stdout: str, our_package_name: str) -> list[str]:
+    output = [*{*stdout.splitlines()}]  # dedup items
+    output = [
+        p for p in output if not p.startswith(our_package_name)
+    ]  # remove our package
 
-    run_command(f'python3 -m venv {tmpdir}')
-    run_command(f'{tmpdir}/bin/pip install .')
-    stdout, _, _ = run_command(f'{tmpdir}/bin/pip freeze')
-
-    frozen = [*{*stdout.splitlines()}]  # dedup items
-    frozen = sorted([p for p in frozen if not p.startswith(our_package_name)])
+    return output
 
-    print_packages(frozen, 'base-frozen')
 
-    Path('requirements.txt').write_text(
-        FILE_HEADER + '\n'.join(frozen) + '\n', encoding='utf8'
+def freeze_reqs(our_package_name: str, tmpdir: str, target: str) -> None:
+    target_selector = '.' if target == '' else f'.[{target}]'
+    target_file = (
+        'requirements.txt' if target == '' else f'requirements-{target}.txt'
     )
 
-    return frozen
+    print(f"installing selector: '{target_selector}'")
 
+    run_command(f'python3 -m venv {tmpdir}')
 
-def save_extra_reqs(
-    our_package_name: str, tmpdir: str, base_frozen: list[str], extra: str
-) -> None:
-    print(f'installing extra: {extra}')
+    base_reqs: list[str] = []
+    if target != '':
+        # get base deps for extras
+        run_command(f'{tmpdir}/bin/pip install .')
+        _stdout, _, _ = run_command(f'{tmpdir}/bin/pip freeze')
+        base_reqs = filter_output(_stdout, our_package_name)
 
-    run_command(f'{tmpdir}/bin/pip install .[{extra}]')
-    stdout, _, _ = run_command(f'{tmpdir}/bin/pip freeze')
+    run_command(f'{tmpdir}/bin/pip install {target_selector}')
+    _stdout, _, _ = run_command(f'{tmpdir}/bin/pip freeze')
+    frozen = filter_output(_stdout, our_package_name)  #
 
-    frozen = [*{*stdout.splitlines()} - {*base_frozen}]  # remove base deps
-    frozen = sorted([p for p in frozen if not p.startswith(our_package_name)])
+    # remove base deps from extras
+    frozen = sorted([*{*frozen} - {*base_reqs}])
 
-    print_packages(frozen, f'{extra}-frozen')
+    print_packages(frozen, f'frozen: {target_selector}', target_file)
 
-    Path(f'requirements-{extra}.txt').write_text(
+    Path(target_file).write_text(
         FILE_HEADER + '\n'.join(frozen) + '\n', encoding='utf8'
     )
 
@@ -88,11 +93,8 @@ def main() -> None:
     # install all extra dependencies in a new venv, so we don't get duplicate/unwanted deps
     for target in TARGETS:
         with TemporaryDirectory() as tmpdir:
-            print(f'using tmpdir={tmpdir}')
-            base_frozen = save_base_reqs(our_package_name, tmpdir)
-            if not target:
-                continue  # skip extra requirements for base package
-            save_extra_reqs(our_package_name, tmpdir, base_frozen, target)
+            print(f"using tmpdir: '{tmpdir}'")
+            freeze_reqs(our_package_name, tmpdir, target)
 
 
 if __name__ == '__main__':