diff --git a/pkgs/development/compilers/sbcl/default.nix b/pkgs/development/compilers/sbcl/default.nix
index ddb5dc2d07e2..ef7afd954258 100644
--- a/pkgs/development/compilers/sbcl/default.nix
+++ b/pkgs/development/compilers/sbcl/default.nix
@@ -30,8 +30,8 @@ let
     "2.4.10".sha256 = "sha256-zus5a2nSkT7uBIQcKva+ylw0LOFGTD/j5FPy3hDF4vg=";
     # By unofficial and very loose convention we keep the latest version of
     # SBCL, and the previous one in case someone quickly needs to roll back.
-    "2.6.1".sha256 = "sha256-XyzVu30+bZFJpZwFrNhCmzvhhJIRdp5aN0UdAB4ZbX8=";
     "2.6.3".sha256 = "sha256-50MvtkKVLdJaX8DFbSGPPQqlls5C0z76gwkbyn1pmIo=";
+    "2.6.4".sha256 = "sha256-O6U+ZUtg/rfE9QRmGZ1tUmDyZhxxG6ItS3cLZVQA1Xs=";
   };
   # Collection of pre-built SBCL binaries for platforms that need them for
   # bootstrapping. Ideally these are to be avoided.  If ECL (or any other
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 947fcf6bc63e..3fdf4cc0bebc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7653,14 +7653,6 @@ with pkgs;
     ];
   };
 
-  sbcl_2_6_1 = wrapLisp {
-    pkg = callPackage ../development/compilers/sbcl { version = "2.6.1"; };
-    faslExt = "fasl";
-    flags = [
-      "--dynamic-space-size"
-      "3000"
-    ];
-  };
   sbcl_2_6_3 = wrapLisp {
     pkg = callPackage ../development/compilers/sbcl { version = "2.6.3"; };
 
@@ -7670,7 +7662,15 @@ with pkgs;
       "3000"
     ];
   };
-  sbcl = sbcl_2_6_3;
+  sbcl_2_6_4 = wrapLisp {
+    pkg = callPackage ../development/compilers/sbcl { version = "2.6.4"; };
+    faslExt = "fasl";
+    flags = [
+      "--dynamic-space-size"
+      "3000"
+    ];
+  };
+  sbcl = sbcl_2_6_4;
 
   sbclPackages = recurseIntoAttrs sbcl.pkgs;