diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 038c4fa1352b..a9688eb78f1f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6659,6 +6659,8 @@ with pkgs;
       lldb_20 = llvmPackages_20.lldb;
       llvm_20 = llvmPackages_20.llvm;
       bolt_20 = llvmPackages_20.bolt;
+
+      mkLLVMPackages = llvmPackagesSet.mkPackage;
     })
     llvmPackages_12
     llvmPackages_13
@@ -6683,6 +6685,7 @@ with pkgs;
     lldb_20
     llvm_20
     bolt_20
+    mkLLVMPackages
     ;
 
   lorri = callPackage ../tools/misc/lorri {