diff --git a/pkgs/by-name/ip/ipmitool/package.nix b/pkgs/by-name/ip/ipmitool/package.nix
index 9a4e2b2cb1ce..565b815874fa 100644
--- a/pkgs/by-name/ip/ipmitool/package.nix
+++ b/pkgs/by-name/ip/ipmitool/package.nix
@@ -37,12 +37,13 @@ stdenv.mkDerivation {
     readline
   ];
 
-  postPatch = ''
-    cp ${iana-enterprise-numbers} enterprise-numbers
-  '';
-
   configureFlags = [ "--disable-registry-download" ];
 
+  postInstall = ''
+    # Install to path reported in configure as "Set IANA PEN dictionary search path to ..."
+    install -Dm444 ${iana-enterprise-numbers} $out/share/misc/enterprise-numbers
+  '';
+
   meta = {
     description = "Command-line interface to IPMI-enabled devices";
     mainProgram = "ipmitool";