diff --git a/flake.nix b/flake.nix
index c706f4dc7f..d9f89f70d7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -237,6 +237,7 @@
           buildInputs = [
             # our compiling toolchain
             hpkgs.ghc
+            hpkgs.cabal-install
             # @guibou: I'm not sure hie-bios is needed
             # pkgs.haskellPackages.hie-bios
             # Dependencies needed to build some parts of hackage