coqPackages.VST: build and install more modules from floyd/

Fixes #131203

pkgs/development/coq-modules/VST/default.nix

@@ -1,4 +1,16 @@
-{ lib, mkCoqDerivation, coq, compcert, version ? null }:
+{ lib, mkCoqDerivation, coq, compcert, ITree, version ? null }:
+
+# A few modules that are not built and installed by default
+#  but that may be useful to some users.
+# They depend on ITree.
+let extra_floyd_files = [
+  "ASTsize.v"
+  "io_events.v"
+  "powerlater.v"
+  "printf.v"
+  "quickprogram.v"
+  ];
+in
 
 with lib; mkCoqDerivation {
   pname = "coq${coq.coq-version}-VST";
@@ -12,9 +24,14 @@ with lib; mkCoqDerivation {
   ] null;
   release."2.8".sha256 = "sha256-cyK88uzorRfjapNQ6XgQEmlbWnDsiyLve5po1VG52q0=";
   releaseRev = v: "v${v}";
+  extraBuildInputs = [ ITree ];
   propagatedBuildInputs = [ compcert ];
 
-  preConfigure = "patchShebangs util";
+  preConfigure = ''
+    patchShebangs util
+    substituteInPlace Makefile \
+      --replace 'FLOYD_FILES=' 'FLOYD_FILES= ${toString extra_floyd_files}'
+  '';
 
   makeFlags = [
     "BITSIZE=64"