diff --git a/pkgs/development/compilers/llvm/8/llvm.nix b/pkgs/development/compilers/llvm/8/llvm.nix
index b556a638f1f6..df3d6e796aa0 100644
--- a/pkgs/development/compilers/llvm/8/llvm.nix
+++ b/pkgs/development/compilers/llvm/8/llvm.nix
@@ -109,7 +109,7 @@ in stdenv.mkDerivation ({
     "-DCAN_TARGET_i386=false"
   ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "-DCMAKE_CROSSCOMPILING=True"
-    "-DLLVM_TABLEGEN=${buildPackages.llvm_7}/bin/llvm-tblgen"
+    "-DLLVM_TABLEGEN=${buildPackages.llvm_8}/bin/llvm-tblgen"
   ];
 
   postBuild = ''
diff --git a/pkgs/development/compilers/llvm/9/llvm.nix b/pkgs/development/compilers/llvm/9/llvm.nix
index c8f78f5f7f21..d4af41ee436e 100644
--- a/pkgs/development/compilers/llvm/9/llvm.nix
+++ b/pkgs/development/compilers/llvm/9/llvm.nix
@@ -126,7 +126,7 @@ in stdenv.mkDerivation (rec {
     "-DCAN_TARGET_i386=false"
   ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "-DCMAKE_CROSSCOMPILING=True"
-    "-DLLVM_TABLEGEN=${buildPackages.llvm_7}/bin/llvm-tblgen"
+    "-DLLVM_TABLEGEN=${buildPackages.llvm_9}/bin/llvm-tblgen"
   ];
 
   postBuild = ''