diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2edce7918994..bb26652913bc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4407,6 +4407,7 @@ in
 
   clang = llvmPackages.clang;
 
+  clang_39 = llvmPackages_39.clang;
   clang_38 = llvmPackages_38.clang;
   clang_37 = llvmPackages_37.clang;
   clang_36 = llvmPackages_36.clang;
@@ -4933,6 +4934,7 @@ in
 
   llvm = llvmPackages.llvm;
 
+  llvm_39 = llvmPackages_39.llvm;
   llvm_38 = llvmPackages_38.llvm;
   llvm_37 = llvmPackages_37.llvm;
   llvm_36 = llvmPackages_36.llvm;