diff --git a/pkgs/development/compilers/fstar/default.nix b/pkgs/development/compilers/fstar/default.nix
index e38f416b261b..d084889dcac9 100644
--- a/pkgs/development/compilers/fstar/default.nix
+++ b/pkgs/development/compilers/fstar/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, writeScript, fetchFromGitHub, z3, ocamlPackages, makeWrapper, installShellFiles }:
+{ lib, stdenv, writeScript, fetchFromGitHub, z3, ocamlPackages, makeWrapper, installShellFiles, removeReferencesTo }:
 
 stdenv.mkDerivation rec {
   pname = "fstar";
@@ -16,6 +16,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     makeWrapper
     installShellFiles
+    removeReferencesTo
   ] ++ (with ocamlPackages; [
     ocaml
     findlib
@@ -55,6 +56,10 @@ stdenv.mkDerivation rec {
     mkdir -p $out/lib/ocaml/${ocamlPackages.ocaml.version}/site-lib/fstarlib
   '';
   postInstall = ''
+    # Remove build artifacts
+    find $out -name _build -type d | xargs -I{} rm -rf "{}"
+    remove-references-to -t '${ocamlPackages.ocaml}' $out/bin/fstar.exe
+
     wrapProgram $out/bin/fstar.exe --prefix PATH ":" "${z3}/bin"
     installShellCompletion --bash .completion/bash/fstar.exe.bash
     installShellCompletion --fish .completion/fish/fstar.exe.fish