diff --git a/pkgs/by-name/py/pyCA/package.nix b/pkgs/by-name/py/pyca/package.nix
similarity index 97%
rename from pkgs/by-name/py/pyCA/package.nix
rename to pkgs/by-name/py/pyca/package.nix
index 98b1f62c0e8d..82dc9b8d2372 100644
--- a/pkgs/by-name/py/pyCA/package.nix
+++ b/pkgs/by-name/py/pyca/package.nix
@@ -11,7 +11,7 @@ let
   python = python3.override {
     self = python;
     packageOverrides = self: super: {
-      # pyCA is incompatible with SQLAlchemy 2.0
+      # pyca is incompatible with SQLAlchemy 2.0
       sqlalchemy = super.sqlalchemy_1_4;
     };
   };
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 8823598b6f53..644bfc9a1b56 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1589,6 +1589,7 @@ mapAliases {
   purple-slack = throw "'purple-slack' has been renamed to/replaced by 'pidginPackages.purple-slack'"; # Converted to throw 2025-10-27
   purple-vk-plugin = throw "'purple-vk-plugin' has been removed as upstream repository was deleted and no active forks are found."; # Added 2025-09-17
   purple-xmpp-http-upload = throw "'purple-xmpp-http-upload' has been renamed to/replaced by 'pidginPackages.purple-xmpp-http-upload'"; # Converted to throw 2025-10-27
+  pyCA = warnAlias "'pyCA' was renamed to 'pyca'" pyca; # Added 2026-02-12
   pyo3-pack = throw "'pyo3-pack' has been renamed to/replaced by 'maturin'"; # Converted to throw 2025-10-27
   pypolicyd-spf = throw "'pypolicyd-spf' has been renamed to/replaced by 'spf-engine'"; # Converted to throw 2025-10-27
   python3Full = throw "python3Full has been removed. Bluetooth support is now enabled by default. The tkinter package is available within the package set."; # Added 2025-08-30