diff --git a/src/python/jw/pkg/cmds/secrets/Cmd.py b/src/python/jw/pkg/cmds/secrets/Cmd.py
index 9b02e6e6..c9bb7316 100644
--- a/src/python/jw/pkg/cmds/secrets/Cmd.py
+++ b/src/python/jw/pkg/cmds/secrets/Cmd.py
@@ -8,8 +8,8 @@ from ..CmdSecrets import CmdSecrets as Parent
 from .lib.DistroContext import DistroContext
 
 if TYPE_CHECKING:
+    from collections.abc import Collection
     from argparse import ArgumentParser
-    from typing import Iterable
 
     from .lib.base import Attrs
 
@@ -19,27 +19,27 @@ class Cmd(Base):  # export
     def ctx(self) -> DistroContext:
         return DistroContext(self.app.distro)
 
-    async def _match_files(self, packages: Iterable[str], pattern: str) -> list[str]:
+    async def _match_files(self, packages: Collection[str], pattern: str) -> list[str]:
         return await self.ctx.match_files(packages, pattern)
 
-    async def _list_template_files(self, packages: Iterable[str]) -> list[str]:
+    async def _list_template_files(self, packages: Collection[str]) -> list[str]:
         return await self.ctx.list_template_files(packages)
 
     async def _list_secret_paths(
-        self, packages: Iterable[str], ignore_missing: bool = False
+        self, packages: Collection[str], ignore_missing: bool = False
     ) -> list[str]:
         return await self.ctx.list_secret_paths(packages, ignore_missing)
 
     async def _list_compilation_targets(
-        self, packages: Iterable[str], ignore_missing: bool = False
+        self, packages: Collection[str], ignore_missing: bool = False
     ) -> list[str]:
         return await self.ctx.list_compilation_targets(packages, ignore_missing)
 
-    async def _remove_compilation_targets(self, packages: Iterable[str]) -> list[str]:
+    async def _remove_compilation_targets(self, packages: Collection[str]) -> list[str]:
         return await self.ctx.remove_compilation_targets(packages)
 
     async def _compile_template_files(
-        self, packages: Iterable[str], default_attrs: Attrs
+        self, packages: Collection[str], default_attrs: Attrs
     ) -> list[str]:
         return await self.ctx.compile_template_files(packages, default_attrs)
 
diff --git a/src/python/jw/pkg/cmds/secrets/lib/DistroContext.py b/src/python/jw/pkg/cmds/secrets/lib/DistroContext.py
index 37780baf..95edc540 100644
--- a/src/python/jw/pkg/cmds/secrets/lib/DistroContext.py
+++ b/src/python/jw/pkg/cmds/secrets/lib/DistroContext.py
@@ -11,8 +11,8 @@ from ....lib.ProcFilterGpg import ProcFilterGpg
 from .FilesContext import FilesContext
 
 if TYPE_CHECKING:
+    from collections.abc import Collection
     from .base import Attrs
-    from typing import Iterable
 
     from ....lib.Distro import Distro
 
@@ -22,7 +22,7 @@ class DistroContext(FilesContext):
         super().__init__(distro.ctx)
         self.__distro = distro
 
-    async def match_files(self, pkg_names: Iterable[str], pattern: str) -> list[str]:
+    async def match_files(self, pkg_names: Collection[str], pattern: str) -> list[str]:
         ret: list[str] = []
         for pkg_name in pkg_names:
             for path in await self.__distro.pkg_files(pkg_name):
@@ -30,13 +30,13 @@ class DistroContext(FilesContext):
                     ret.append(path)
         return ret
 
-    async def list_template_files(self, pkg_names: Iterable[str]) -> list[str]:
+    async def list_template_files(self, pkg_names: Collection[str]) -> list[str]:
         if not pkg_names:
             pkg_names = [p.name for p in await self.__distro.select()]
         return await self.match_files(pkg_names, pattern = r'.*\.jw-tmpl$')
 
     async def list_secret_paths(
-        self, pkg_names: Iterable[str], ignore_missing: bool = False
+        self, pkg_names: Collection[str], ignore_missing: bool = False
     ) -> list[str]:
         ret = []
         for tmpl in await self.list_template_files(pkg_names):
@@ -47,7 +47,7 @@ class DistroContext(FilesContext):
         return ret
 
     async def list_compilation_targets(
-        self, pkg_names: Iterable[str], ignore_missing: bool = False
+        self, pkg_names: Collection[str], ignore_missing: bool = False
     ) -> list[str]:
         ret = []
         for tmpl in await self.list_template_files(pkg_names):
@@ -57,7 +57,7 @@ class DistroContext(FilesContext):
             ret.append(path)
         return ret
 
-    async def remove_compilation_targets(self, pkg_names: Iterable[str]) -> list[str]:
+    async def remove_compilation_targets(self, pkg_names: Collection[str]) -> list[str]:
         ret: list[str] = []
         for path in await self.list_compilation_targets(pkg_names):
             try:
@@ -71,7 +71,7 @@ class DistroContext(FilesContext):
         return ret
 
     async def compile_template_files(
-        self, pkg_names: Iterable[str], default_attrs: Attrs
+        self, pkg_names: Collection[str], default_attrs: Attrs
     ) -> list[str]:
         ret: list[str] = []
         missing = 0
@@ -96,7 +96,7 @@ class DistroContext(FilesContext):
     async def install(
         self,
         src_uri: str,
-        pkg_names: Iterable[str],
+        pkg_names: Collection[str],
         only_missing: bool = False,
         verbose: bool = False,
     ) -> None:
diff --git a/src/python/jw/pkg/lib/Distro.py b/src/python/jw/pkg/lib/Distro.py
index 5accdab1..467636b4 100644
--- a/src/python/jw/pkg/lib/Distro.py
+++ b/src/python/jw/pkg/lib/Distro.py
@@ -12,6 +12,7 @@ from .log import ERR, INFO, WARNING, log
 from .base import InputMode
 
 if TYPE_CHECKING:
+    from collections.abc import Collection
     from typing import Iterable
 
     from .base import Result
@@ -359,16 +360,16 @@ class Distro(abc.ABC):
     # -- select
 
     @abc.abstractmethod
-    async def _select_by_name(self, names: Iterable[str]) -> Iterable[Package]:
+    async def _select_by_name(self, names: Collection[str]) -> Iterable[Package]:
         pass
 
-    async def _select(self, names: Iterable[str],
+    async def _select(self, names: Collection[str],
                       filter: PackageFilter) -> Iterable[Package]:
         return [p for p in await self._select_by_name(names) if filter.match(p)]
 
     async def select(
         self,
-        names: Iterable[str] = [],
+        names: Collection[str] = [],
         filter: PackageFilter | None = None
     ) -> Iterable[Package]:
         if not filter:
@@ -434,7 +435,7 @@ class Distro(abc.ABC):
         if names:
             await self._install(names, only_update = only_update)
 
-    async def install(self, names: Iterable[str], only_update: bool = False) -> None:
+    async def install(self, names: Collection[str], only_update: bool = False) -> None:
         if not names:
             log(WARNING, 'No packages specified for installation')
             return
@@ -446,7 +447,7 @@ class Distro(abc.ABC):
     async def _delete(self, names: Iterable[str]) -> None:
         pass
 
-    async def delete(self, names: Iterable[str]) -> None:
+    async def delete(self, names: Collection[str]) -> None:
         if not names:
             log(WARNING, 'No packages specified for deletion')
             return
diff --git a/src/python/jw/pkg/lib/distros/suse/Distro.py b/src/python/jw/pkg/lib/distros/suse/Distro.py
index 0bbe1b6c..44675cc6 100644
--- a/src/python/jw/pkg/lib/distros/suse/Distro.py
+++ b/src/python/jw/pkg/lib/distros/suse/Distro.py
@@ -6,6 +6,7 @@ from ...Distro import Distro as Base
 from ...pm.rpm import list_files, query_packages, run_rpm
 
 if TYPE_CHECKING:
+    from collections.abc import Collection
     from typing import Iterable
 
     from ...base import Result
@@ -68,7 +69,7 @@ class Distro(Base):
         return False
 
     @override
-    async def _select_by_name(self, names: Iterable[str]) -> Iterable[Package]:
+    async def _select_by_name(self, names: Collection[str]) -> Iterable[Package]:
         return await query_packages(names, ec = self.ctx)
 
     @override
diff --git a/src/python/jw/pkg/lib/pm/rpm.py b/src/python/jw/pkg/lib/pm/rpm.py
index 8635a9d5..01995b8b 100644
--- a/src/python/jw/pkg/lib/pm/rpm.py
+++ b/src/python/jw/pkg/lib/pm/rpm.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Iterable
+from typing import TYPE_CHECKING, Collection, Iterable
 
 from ..base import InputMode
 from ..Package import Package
@@ -41,7 +41,7 @@ async def run_rpm(  # export
     return result.stdout_str
 
 async def query_packages(  # export
-    names: Iterable[str] = [],
+    names: Collection[str] = [],
     ec: ExecContext | None = None,
 ) -> Iterable[Package]:
     fmt_str = (