diff --git a/pkgs/development/python-modules/sleekxmpp/default.nix b/pkgs/development/python-modules/sleekxmpp/default.nix
deleted file mode 100644
index 382cc7c28e7c..000000000000
--- a/pkgs/development/python-modules/sleekxmpp/default.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{
-  stdenv,
-  lib,
-  fetchPypi,
-  buildPythonPackage,
-  pythonAtLeast,
-  dnspython,
-  pyasn1,
-}:
-
-buildPythonPackage rec {
-  pname = "sleekxmpp";
-  version = "1.3.3";
-  format = "setuptools";
-
-  disabled = pythonAtLeast "3.10"; # Deprecated in favor of Slixmpp
-
-  propagatedBuildInputs = [
-    dnspython
-    pyasn1
-  ];
-
-  patches = [ ./dnspython-ip6.patch ];
-
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "d213c1de71d92505f95ced0460ee0f84fdc4ddcacb7d7dd343739ed4028e5569";
-  };
-
-  meta = {
-    broken =
-      (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isAarch64) || stdenv.hostPlatform.isDarwin;
-    description = "XMPP library for Python";
-    license = lib.licenses.mit;
-    homepage = "http://sleekxmpp.com/";
-  };
-}
diff --git a/pkgs/development/python-modules/sleekxmpp/dnspython-ip6.patch b/pkgs/development/python-modules/sleekxmpp/dnspython-ip6.patch
deleted file mode 100644
index d8d6eb106838..000000000000
--- a/pkgs/development/python-modules/sleekxmpp/dnspython-ip6.patch
+++ /dev/null
@@ -1,55 +0,0 @@
---- a/sleekxmpp/xmlstream/resolver.py
-+++ b/sleekxmpp/xmlstream/resolver.py
-@@ -175,6 +175,9 @@ def get_A(host, resolver=None, use_dnspy
-     """
-     log.debug("DNS: Querying %s for A records." % host)
-
-+    if isinstance(host, bytes):
-+        host = host.decode("utf-8")
-+
-     # If not using dnspython, attempt lookup using the OS level
-     # getaddrinfo() method.
-     if resolver is None or not use_dnspython:
-@@ -189,7 +192,10 @@ def get_A(host, resolver=None, use_dnspy
-     # Using dnspython:
-     try:
-         recs = resolver.query(host, dns.rdatatype.A)
--        return [rec.to_text() for rec in recs]
-+        if isinstance(recs[0].to_text(), bytes):
-+            return [rec.to_text().decode("utf-8") for rec in recs]
-+        else:
-+            return [rec.to_text() for rec in recs]
-     except (dns.resolver.NXDOMAIN, dns.resolver.NoAnswer):
-         log.debug("DNS: No A records for %s" % host)
-         return []
-@@ -222,6 +228,9 @@ def get_AAAA(host, resolver=None, use_dn
-     """
-     log.debug("DNS: Querying %s for AAAA records." % host)
-
-+    if isinstance(host, bytes):
-+        host = host.decode("utf-8")
-+
-     # If not using dnspython, attempt lookup using the OS level
-     # getaddrinfo() method.
-     if resolver is None or not use_dnspython:
-@@ -240,7 +249,10 @@ def get_AAAA(host, resolver=None, use_dn
-     # Using dnspython:
-     try:
-         recs = resolver.query(host, dns.rdatatype.AAAA)
--        return [rec.to_text() for rec in recs]
-+        if isinstance(recs[0].to_text(), bytes):
-+            return [rec.to_text().decode("utf-8") for rec in recs]
-+        else:
-+            return [rec.to_text() for rec in recs]
-     except (dns.resolver.NXDOMAIN, dns.resolver.NoAnswer):
-         log.debug("DNS: No AAAA records for %s" % host)
-         return []
-@@ -324,6 +336,8 @@ def get_SRV(host, port, service, proto='
-                 if running_sum >= selected:
-                     rec = sums[running_sum]
-                     host = rec.target.to_text()
-+                    if isinstance(host, bytes):
-+                        host = host.decode("utf-8")
-                     if host.endswith('.'):
-                         host = host[:-1]
-                     sorted_recs.append((host, rec.port))
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index 42dec1460948..45fd3c445749 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -463,6 +463,7 @@ mapAliases {
   sip_4 = throw "'sip_4' has been renamed to/replaced by 'sip4'"; # Converted to throw 2025-10-29
   sipsimple = lib.warnOnInstantiate "'sipsimple' has been renamed to 'python3-sipsimple' to fit upstream naming" python3-sipsimple; # added 2026-01-05
   slackclient = throw "'slackclient' has been renamed to/replaced by 'slack-sdk'"; # Converted to throw 2025-10-29
+  sleekxmpp = throw "'sleekxmpp' has been removed because it was deprecated in favor of 'slixmpp'"; # added 2026-01-19
   smart_open = throw "'smart_open' has been renamed to/replaced by 'smart-open'"; # Converted to throw 2025-10-29
   smpp_pdu = throw "'smpp_pdu' has been renamed to/replaced by 'smpp-pdu'"; # Converted to throw 2025-10-29
   sorl_thumbnail = throw "'sorl_thumbnail' has been renamed to/replaced by 'sorl-thumbnail'"; # Converted to throw 2025-10-29
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index e157c3ebbd56..ec98ac8d4a21 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -17448,8 +17448,6 @@ self: super: with self; {
 
   slapd = callPackage ../development/python-modules/slapd { };
 
-  sleekxmpp = callPackage ../development/python-modules/sleekxmpp { };
-
   sleekxmppfs = callPackage ../development/python-modules/sleekxmppfs { };
 
   sleepyq = callPackage ../development/python-modules/sleepyq { };