diff --git a/var/spack/repos/builtin/packages/libksba/package.py b/var/spack/repos/builtin/packages/libksba/package.py
index c92d7ac042..1543167d39 100644
--- a/var/spack/repos/builtin/packages/libksba/package.py
+++ b/var/spack/repos/builtin/packages/libksba/package.py
@@ -2,8 +2,6 @@
 # Spack Project Developers. See the top-level COPYRIGHT file for details.
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
-
-
 from spack.package import *
 
 
@@ -19,49 +17,18 @@ class Libksba(AutotoolsPackage):
 
     license("LGPL-3.0-only AND GPL-2.0-only AND GPL-3.0-only")
 
+    version("1.6.6", sha256="5dec033d211559338838c0c4957c73dfdc3ee86f73977d6279640c9cd08ce6a4")
     version("1.6.5", sha256="a564628c574c99287998753f98d750babd91a4e9db451f46ad140466ef2a6d16")
     version("1.6.4", sha256="bbb43f032b9164d86c781ffe42213a83bf4f2fee91455edfa4654521b8b03b6b")
     version("1.6.3", sha256="3f72c68db30971ebbf14367527719423f0a4d5f8103fc9f4a1c01a9fa440de5c")
-
-    # Deprecated over CVE-2022-3515 (https://gnupg.org/blog/20221017-pepe-left-the-ksba.html)
-    version(
-        "1.6.2",
-        sha256="fce01ccac59812bddadffacff017dac2e4762bdb6ebc6ffe06f6ed4f6192c971",
-        deprecated=True,
-    )
-    version(
-        "1.6.0",
-        sha256="dad683e6f2d915d880aa4bed5cea9a115690b8935b78a1bbe01669189307a48b",
-        deprecated=True,
-    )
-    version(
-        "1.5.1",
-        sha256="b0f4c65e4e447d9a2349f6b8c0e77a28be9531e4548ba02c545d1f46dc7bf921",
-        deprecated=True,
-    )
-    version(
-        "1.5.0",
-        sha256="ae4af129216b2d7fdea0b5bf2a788cd458a79c983bb09a43f4d525cc87aba0ba",
-        deprecated=True,
-    )
-    version(
-        "1.4.0",
-        sha256="bfe6a8e91ff0f54d8a329514db406667000cb207238eded49b599761bfca41b6",
-        deprecated=True,
-    )
-    version(
-        "1.3.5",
-        sha256="41444fd7a6ff73a79ad9728f985e71c9ba8cd3e5e53358e70d5f066d35c1a340",
-        deprecated=True,
-    )
+    # Versions before 1.6.3 were deprecated over CVE-2022-3515
+    # (https://gnupg.org/blog/20221017-pepe-left-the-ksba.html)
 
     depends_on("libgpg-error@1.8:")
 
-    conflicts("%apple-clang@12:", when="@:1.3")
-
     def configure_args(self):
         return [
             "--enable-static",
             "--enable-shared",
-            "--with-libgpg-error-prefix=" + self.spec["libgpg-error"].prefix,
+            f"--with-libgpg-error-prefix={self.spec['libgpg-error'].prefix}",
         ]