diff --git a/nix-tools/overlay.nix b/nix-tools/overlay.nix
index 5d63272fbf..dd915b6f48 100644
--- a/nix-tools/overlay.nix
+++ b/nix-tools/overlay.nix
@@ -1,7 +1,7 @@
 final: _prev:
 
 let
-  compiler-nix-name = "ghc964";
+  compiler-nix-name = "ghc96";
 
   nix-tools = nix-tools-set {
     nix-tools = nix-tools-unchecked;
diff --git a/overlays/bootstrap.nix b/overlays/bootstrap.nix
index bcb44291b3..ad084e0529 100644
--- a/overlays/bootstrap.nix
+++ b/overlays/bootstrap.nix
@@ -9,7 +9,7 @@ let
       "9.0" = "9.0.2";
       "9.2" = "9.2.8";
       "9.4" = "9.4.8";
-      "9.6" = "9.6.4";
+      "9.6" = "9.6.5";
       "9.8" = "9.8.2";
     };
     gitInputs = {
@@ -238,7 +238,8 @@ in {
                 ++ final.lib.optionals (final.stdenv.targetPlatform.isGhcjs) (fromUntil "9.6.1"  "9.6.3"  ./patches/ghc/ghc-9.6-JS-implement-TH-support.patch)
                 ++ final.lib.optionals (final.stdenv.targetPlatform.isGhcjs) (fromUntil "9.6.3"  "9.8"    ./patches/ghc/ghc-9.6.3-JS-implement-TH-support.patch)
                 ++ fromUntil "9.8.1"  "9.8.2"  ./patches/ghc/ghc-9.8-cabal-c-soures-fix.patch
-                ++ fromUntil "9.6.3"  "9.9"    ./patches/ghc/ghc-9.6.3-Cabal-9384.patch
+                ++ fromUntil "9.6.3"  "9.6.5"  ./patches/ghc/ghc-9.6.3-Cabal-9384.patch
+                ++ fromUntil "9.8.1"  "9.9"    ./patches/ghc/ghc-9.6.3-Cabal-9384.patch
 
                 # the following is a partial reversal of https://gitlab.haskell.org/ghc/ghc/-/merge_requests/4391, to address haskell.nix#1227
                 ++ final.lib.optional (versionAtLeast "8.10.6" && versionLessThan "9.0" && final.stdenv.targetPlatform.isAarch64) ./patches/ghc/mmap-next.patch
@@ -937,7 +938,8 @@ in {
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
                     then final.buildPackages.buildPackages.haskell-nix.compiler.ghc961
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc964
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc965
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
                           or final.buildPackages.buildPackages.haskell.compiler.ghc962
                           or final.buildPackages.buildPackages.haskell.compiler.ghc945
@@ -963,7 +965,8 @@ in {
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
                     then final.buildPackages.buildPackages.haskell-nix.compiler.ghc962
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc964
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc965
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
                           or final.buildPackages.buildPackages.haskell.compiler.ghc962
                           or final.buildPackages.buildPackages.haskell.compiler.ghc945
@@ -989,7 +992,8 @@ in {
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
                     then final.buildPackages.buildPackages.haskell-nix.compiler.ghc963
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc964
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc965
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
                           or final.buildPackages.buildPackages.haskell.compiler.ghc962
                           or final.buildPackages.buildPackages.haskell.compiler.ghc945
@@ -1015,7 +1019,8 @@ in {
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
                     then final.buildPackages.buildPackages.haskell-nix.compiler.ghc964
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc964
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc965
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
                           or final.buildPackages.buildPackages.haskell.compiler.ghc962
                           or final.buildPackages.buildPackages.haskell.compiler.ghc945
@@ -1035,6 +1040,33 @@ in {
 
                 ghc-patches = ghc-patches "9.6.4";
             });
+            ghc965 = final.callPackage ../compiler/ghc (traceWarnOld "9.6" {
+                extra-passthru = { buildGHC = final.buildPackages.haskell-nix.compiler.ghc965; };
+
+                bootPkgs = bootPkgsGhc94 // {
+                  ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
+                    then final.buildPackages.buildPackages.haskell-nix.compiler.ghc965
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc965
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc964
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc963
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc962
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc945
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc944
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc943;
+                };
+                inherit sphinx;
+
+                buildLlvmPackages = final.buildPackages.llvmPackages_12;
+                llvmPackages = final.llvmPackages_12;
+
+                src-spec = rec {
+                    version = "9.6.5";
+                    url = "https://downloads.haskell.org/~ghc/${version}/ghc-${version}-src.tar.xz";
+                    sha256 = "sha256-h7OJkk+YwaJsIFEidXM4yNqzOtH89nD6oiYidCQyuTw=";
+                };
+
+                ghc-patches = ghc-patches "9.6.5";
+            });
             ghc981 = final.callPackage ../compiler/ghc (traceWarnOld "9.8" {
                 extra-passthru = { buildGHC = final.buildPackages.haskell-nix.compiler.ghc981; };