diff --git a/pkgs/development/compilers/ispc/default.nix b/pkgs/development/compilers/ispc/default.nix
index ee162260929b..b8c48c5c6a01 100644
--- a/pkgs/development/compilers/ispc/default.nix
+++ b/pkgs/development/compilers/ispc/default.nix
@@ -6,13 +6,15 @@
 
 stdenv.mkDerivation rec {
   pname   = "ispc";
-  version = "1.23.0";
+  version = "1.24.0";
+
+  dontFixCmake = true; # https://github.com/NixOS/nixpkgs/pull/232522#issuecomment-2133803566
 
   src = fetchFromGitHub {
     owner  = pname;
     repo   = pname;
     rev    = "v${version}";
-    sha256 = "sha256-zixPt7YICCG0N8t1pcXEu/sPKCVLQVPCiJsQEqEXl+A=";
+    sha256 = "sha256-1Ns8w34fXgYrSu3XE89uowjaVoW3MOgKYV1Jb/XRj1Q=";
   };
 
   nativeBuildInputs = [ cmake which m4 bison flex python3 llvmPackages.libllvm.dev tbb ] ++ lib.lists.optionals stdenv.isDarwin [ xcode ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3981d6ba23e2..9467837c87dc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -21520,7 +21520,7 @@ with pkgs;
 
   ispc = callPackage ../development/compilers/ispc {
     xcode = darwin.xcode_14;
-    llvmPackages = llvmPackages_15;
+    llvmPackages = llvmPackages_17;
   };
 
   isso = callPackage ../servers/isso {