diff --git a/pkgs/development/tools/analysis/include-what-you-use/default.nix b/pkgs/development/tools/analysis/include-what-you-use/default.nix
index 4ad8b3f8380..75e4dba003b 100644
--- a/pkgs/development/tools/analysis/include-what-you-use/default.nix
+++ b/pkgs/development/tools/analysis/include-what-you-use/default.nix
@@ -1,9 +1,8 @@
-{ stdenv, fetchurl, cmake, llvmPackages_37 }:
+{ stdenv, fetchurl, cmake, llvmPackages }:
 
-let
-  version = "0.5";
-  llvmPackages = llvmPackages_37;
-in stdenv.mkDerivation rec {
+# Also bump llvmPackages in all-packages.nix to the supported version!
+let version = "0.5"; in
+stdenv.mkDerivation rec {
   name = "include-what-you-use-${version}";
 
   src = fetchurl {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 305ed0a4735..9cd7dfafdc0 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5746,7 +5746,9 @@ let
     inherit (perlPackages) XMLSimple;
   };
 
-  include-what-you-use = callPackage ../development/tools/analysis/include-what-you-use { };
+  include-what-you-use = callPackage ../development/tools/analysis/include-what-you-use {
+    llvmPackages = llvmPackages_37;
+  };
 
   indent = callPackage ../development/tools/misc/indent { };