diff --git a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/__init__.py b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/__init__.py
index 761af4b8b16d..f89eddab6183 100644
--- a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/__init__.py
+++ b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/__init__.py
@@ -10,7 +10,7 @@ from typing import Final, assert_never
 
 from . import nix, tmpdir
 from .constants import EXECUTABLE, WITH_NIX_2_18, WITH_REEXEC, WITH_SHELL_FILES
-from .models import Action, BuildAttr, Flake, ImageVariants, NRError, Profile
+from .models import Action, BuildAttr, Flake, ImageVariants, NixOSRebuildError, Profile
 from .process import Remote, cleanup_ssh
 from .utils import Args, LogFormatter, tabulate
 
@@ -332,7 +332,7 @@ def reexec(
 
 def validate_image_variant(image_variant: str, variants: ImageVariants) -> None:
     if image_variant not in variants:
-        raise NRError(
+        raise NixOSRebuildError(
             "please specify one of the following supported image variants via "
             "--image-variant:\n" + "\n".join(f"- {v}" for v in variants)
         )
@@ -358,7 +358,7 @@ def validate_nixos_config(path_to_config: Path) -> None:
                 Please open an issue if this is the case.
             """
         ).strip()
-        raise NRError(msg)
+        raise NixOSRebuildError(msg)
 
 
 def execute(argv: list[str]) -> None:
@@ -459,9 +459,11 @@ def execute(argv: list[str]) -> None:
                     if maybe_path_to_config:  # kinda silly but this makes mypy happy
                         path_to_config = maybe_path_to_config
                     else:
-                        raise NRError("could not find previous generation")
+                        raise NixOSRebuildError("could not find previous generation")
                 case (_, True, _, _):
-                    raise NRError(f"--rollback is incompatible with '{action}'")
+                    raise NixOSRebuildError(
+                        f"--rollback is incompatible with '{action}'"
+                    )
                 case (_, False, Remote(_), Flake(_)):
                     path_to_config = nix.build_remote_flake(
                         attr,
diff --git a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/models.py b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/models.py
index f8439461b6bd..c0183e1a265b 100644
--- a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/models.py
+++ b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/models.py
@@ -11,7 +11,7 @@ from .process import Remote, run_wrapper
 type ImageVariants = list[str]
 
 
-class NRError(Exception):
+class NixOSRebuildError(Exception):
     "nixos-rebuild general error."
 
     def __init__(self, message: str) -> None:
diff --git a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/nix.py b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/nix.py
index a55bfd508e37..77113a093a77 100644
--- a/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/nix.py
+++ b/pkgs/by-name/ni/nixos-rebuild-ng/src/nixos_rebuild/nix.py
@@ -20,7 +20,7 @@ from .models import (
     Generation,
     GenerationJson,
     ImageVariants,
-    NRError,
+    NixOSRebuildError,
     Profile,
     Remote,
 )
@@ -256,7 +256,7 @@ def edit(flake: Flake | None, flake_flags: Args | None = None) -> None:
         )
     else:
         if flake_flags:
-            raise NRError("'edit' does not support extra Nix flags")
+            raise NixOSRebuildError("'edit' does not support extra Nix flags")
         nixos_config = Path(
             os.getenv("NIXOS_CONFIG") or find_file("nixos-config") or "/etc/nixos"
         )
@@ -266,7 +266,7 @@ def edit(flake: Flake | None, flake_flags: Args | None = None) -> None:
         if nixos_config.exists():
             run_wrapper([os.getenv("EDITOR", "nano"), nixos_config], check=False)
         else:
-            raise NRError("cannot find NixOS config file")
+            raise NixOSRebuildError("cannot find NixOS config file")
 
 
 def find_file(file: str, nix_flags: Args | None = None) -> Path | None:
@@ -424,7 +424,7 @@ def get_generations(profile: Profile) -> list[Generation]:
     and if this is the current active profile or not.
     """
     if not profile.path.exists():
-        raise NRError(f"no profile '{profile.name}' found")
+        raise NixOSRebuildError(f"no profile '{profile.name}' found")
 
     def parse_path(path: Path, profile: Profile) -> Generation:
         entry_id = path.name.split("-")[1]
@@ -456,7 +456,7 @@ def get_generations_from_nix_env(
     and if this is the current active profile or not.
     """
     if not profile.path.exists():
-        raise NRError(f"no profile '{profile.name}' found")
+        raise NixOSRebuildError(f"no profile '{profile.name}' found")
 
     # Using `nix-env --list-generations` needs root to lock the profile
     r = run_wrapper(
@@ -635,13 +635,13 @@ def switch_to_configuration(
     """
     if specialisation:
         if action not in (Action.SWITCH, Action.TEST):
-            raise NRError(
+            raise NixOSRebuildError(
                 "'--specialisation' can only be used with 'switch' and 'test'"
             )
         path_to_config = path_to_config / f"specialisation/{specialisation}"
 
         if not path_to_config.exists():
-            raise NRError(f"specialisation not found: {specialisation}")
+            raise NixOSRebuildError(f"specialisation not found: {specialisation}")
 
     r = run_wrapper(
         ["test", "-d", "/run/systemd/system"],
diff --git a/pkgs/by-name/ni/nixos-rebuild-ng/src/tests/test_nix.py b/pkgs/by-name/ni/nixos-rebuild-ng/src/tests/test_nix.py
index d87b6b62dca8..d965212a8d74 100644
--- a/pkgs/by-name/ni/nixos-rebuild-ng/src/tests/test_nix.py
+++ b/pkgs/by-name/ni/nixos-rebuild-ng/src/tests/test_nix.py
@@ -714,7 +714,7 @@ def test_switch_to_configuration_without_systemd_run(
         remote=None,
     )
 
-    with pytest.raises(m.NRError) as e:
+    with pytest.raises(m.NixOSRebuildError) as e:
         n.switch_to_configuration(
             config_path,
             m.Action.BOOT,