diff --git a/flake.lock b/flake.lock
index 3a35584c82..e458056a43 100644
--- a/flake.lock
+++ b/flake.lock
@@ -103,11 +103,11 @@
     "hackage": {
       "flake": false,
       "locked": {
-        "lastModified": 1763598401,
-        "narHash": "sha256-ob9BLrE7VWOvzYUZU3Ni6Kynst/eGRH2FAz1i16LGcA=",
+        "lastModified": 1763605384,
+        "narHash": "sha256-rQLBXbwZdY+Nu+sIVFCkNMi6AJUVzUOysD3ajBth+aY=",
         "owner": "input-output-hk",
         "repo": "hackage.nix",
-        "rev": "a9359105928d8c90ca9ec7a92a02a7aa9bfcfcab",
+        "rev": "c5ce8b5cf15a27a5faad73751d93e3c4e8624417",
         "type": "github"
       },
       "original": {
@@ -452,11 +452,11 @@
     },
     "nixpkgs-2411": {
       "locked": {
-        "lastModified": 1748037224,
-        "narHash": "sha256-92vihpZr6dwEMV6g98M5kHZIttrWahb9iRPBm1atcPk=",
+        "lastModified": 1751290243,
+        "narHash": "sha256-kNf+obkpJZWar7HZymXZbW+Rlk3HTEIMlpc6FCNz0Ds=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "f09dede81861f3a83f7f06641ead34f02f37597f",
+        "rev": "5ab036a8d97cb9476fbe81b09076e6e91d15e1b6",
         "type": "github"
       },
       "original": {
@@ -468,11 +468,11 @@
     },
     "nixpkgs-2505": {
       "locked": {
-        "lastModified": 1757716134,
-        "narHash": "sha256-OYoZLWvmCnCTCJQwaQlpK1IO5nkLnLLoUW8wwmPmrfU=",
+        "lastModified": 1762303001,
+        "narHash": "sha256-6Q5fx8I7kI+uHL97pdpUnTm1Uu+OazpHfnv+DCAihtE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e85b5aa112a98805a016bbf6291e726debbc448a",
+        "rev": "139de9c2cb757650424fe8aa2a980eaa93a9e733",
         "type": "github"
       },
       "original": {
@@ -484,11 +484,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1759070547,
-        "narHash": "sha256-JVZl8NaVRYb0+381nl7LvPE+A774/dRpif01FKLrYFQ=",
+        "lastModified": 1762286042,
+        "narHash": "sha256-OD5HsZ+sN7VvNucbrjiCz7CHF5zf9gP51YVJvPwYIH8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "647e5c14cbd5067f44ac86b74f014962df460840",
+        "rev": "12c1f0253aa9a54fdf8ec8aecaafada64a111e24",
         "type": "github"
       },
       "original": {
diff --git a/lib/call-cabal-project-to-nix.nix b/lib/call-cabal-project-to-nix.nix
index 34dec9b988..2c65c5240f 100644
--- a/lib/call-cabal-project-to-nix.nix
+++ b/lib/call-cabal-project-to-nix.nix
@@ -89,7 +89,7 @@ let
       #
       # > The option `packages.Win32.package.identifier.name' is used but not defined.
       #
-      (compilerSelection pkgs)."${compiler-nix-name}";
+      (compilerSelection pkgs.buildPackages)."${compiler-nix-name}";
 
 in let
   ghc = if ghc' ? latestVersion
diff --git a/overlays/bootstrap.nix b/overlays/bootstrap.nix
index 2da240b20f..9405106287 100644
--- a/overlays/bootstrap.nix
+++ b/overlays/bootstrap.nix
@@ -867,8 +867,9 @@ in {
 
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
-                    then final.buildPackages.buildPackages.haskell-nix.compiler.ghc966
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc966
+                    then final.buildPackages.buildPackages.haskell-nix.compiler.ghc967
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc967
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
@@ -893,8 +894,9 @@ in {
 
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
-                    then final.buildPackages.buildPackages.haskell-nix.compiler.ghc966
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc966
+                    then final.buildPackages.buildPackages.haskell-nix.compiler.ghc967
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc967
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
@@ -920,7 +922,8 @@ in {
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
                     then final.buildPackages.buildPackages.haskell-nix.compiler.ghc983
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc966
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc967
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
@@ -946,7 +949,9 @@ in {
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
                     then final.buildPackages.buildPackages.haskell-nix.compiler.ghc984
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc966
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc984
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc967
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
@@ -977,6 +982,7 @@ in {
                          # or final.buildPackages.buildPackages.haskell.compiler.ghc983
                              final.buildPackages.buildPackages.haskell.compiler.ghc982
                           or final.buildPackages.buildPackages.haskell.compiler.ghc981
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc967
                           or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
@@ -1008,6 +1014,7 @@ in {
                          # or final.buildPackages.buildPackages.haskell.compiler.ghc983
                              final.buildPackages.buildPackages.haskell.compiler.ghc982
                           or final.buildPackages.buildPackages.haskell.compiler.ghc981
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc967
                           or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
@@ -1040,6 +1047,7 @@ in {
                           or final.buildPackages.buildPackages.haskell.compiler.ghc983
                           or final.buildPackages.buildPackages.haskell.compiler.ghc982
                           or final.buildPackages.buildPackages.haskell.compiler.ghc981
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc967
                           or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
@@ -1073,6 +1081,7 @@ in {
                           or final.buildPackages.buildPackages.haskell.compiler.ghc983
                           or final.buildPackages.buildPackages.haskell.compiler.ghc982
                           or final.buildPackages.buildPackages.haskell.compiler.ghc981
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc967
                           or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
@@ -1114,6 +1123,7 @@ in {
                           or final.buildPackages.buildPackages.haskell.compiler.ghc983
                           or final.buildPackages.buildPackages.haskell.compiler.ghc982
                           or final.buildPackages.buildPackages.haskell.compiler.ghc981
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc967
                           or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
@@ -1138,8 +1148,9 @@ in {
             } // final.lib.optionalAttrs (builtins.compareVersions version "9.7" <0) {
                 bootPkgs = bootPkgsGhc94 // {
                   ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
-                    then final.buildPackages.buildPackages.haskell-nix.compiler.ghc966
-                    else final.buildPackages.buildPackages.haskell.compiler.ghc966
+                    then final.buildPackages.buildPackages.haskell-nix.compiler.ghc967
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc967
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc966
                           or final.buildPackages.buildPackages.haskell.compiler.ghc965
                           or final.buildPackages.buildPackages.haskell.compiler.ghc964
                           or final.buildPackages.buildPackages.haskell.compiler.ghc963
diff --git a/overlays/mingw_w64.nix b/overlays/mingw_w64.nix
index 2ab1cc133f..c2dd39beaa 100644
--- a/overlays/mingw_w64.nix
+++ b/overlays/mingw_w64.nix
@@ -90,7 +90,7 @@ let
     export WINEDLLOVERRIDES="winemac.drv=d"
     export WINEDEBUG=warn-all,fixme-all,-menubuilder,-mscoree,-ole,-secur32,-winediag
     export LC_ALL=en_US.UTF-8
-    export WINEPREFIX=$TMP
+    export WINEPREFIX=''${WINEPREFIX:-$(mktemp -d)}
     Path="''${Path:-}"
     unset configureFlags
     unset configurePhase
diff --git a/test/coverage/default.nix b/test/coverage/default.nix
index 512e85be8d..de86fb4b1c 100644
--- a/test/coverage/default.nix
+++ b/test/coverage/default.nix
@@ -29,7 +29,9 @@ in recurseIntoAttrs ({
   # Does not work on ghcjs because it needs zlib. Wasm needs network fixed.
   meta.disabled = stdenv.hostPlatform.isGhcjs || stdenv.hostPlatform.isWasm
     # For some reason the `.tix` file is not created on armv7a android (not sure why)
-    || stdenv.hostPlatform.isAndroid && stdenv.hostPlatform.isAarch32;
+    || stdenv.hostPlatform.isAndroid && stdenv.hostPlatform.isAarch32
+    # The `input.txt` is not written (or just not found) for mingwW64 (ucrt64 works ok)
+    || (stdenv.hostPlatform.isWindows && stdenv.hostPlatform.libc != "ucrt");
   run = stdenv.mkDerivation {
     name = "coverage-test";
 
diff --git a/test/unit.nix b/test/unit.nix
index 355169dbf6..b5e1dfd9a2 100644
--- a/test/unit.nix
+++ b/test/unit.nix
@@ -143,7 +143,7 @@ lib.runTests {
             secure: True
             root-keys:
             key-threshold: 0
-            --sha256: sha256-y1vQnXI1XzkjnC4h66tVDmu2TZjZPcMrZEnE3m0XOfg=
+            --sha256: sha256-tyeqsCew1ptGCrNAIrw5R2sz+oSqWbWrd/wDAPh1hMs=
           -- end of block
       ''));
       expected = __toJSON {