diff --git a/shell.nix b/shell.nix
index abdf49d..0d455b1 100644
--- a/shell.nix
+++ b/shell.nix
@@ -15,6 +15,7 @@ pkgs.mkShell rec {
       mpfr
       texinfo
       isl
+      zlib
     ];
     RUSTC_VERSION = "nightly"; # Required for some experimental cargo features
     hardeningDisable = [ "all" ]; # Required to compile gcc
@@ -25,7 +26,7 @@ pkgs.mkShell rec {
       export PATH=$PATH:''${CARGO_HOME:-~/.cargo}/bin
       export PATH=$PATH:''${RUSTUP_HOME:-~/.rustup}/toolchains/nightly-x86_64-unknown-linux-gnu/bin/
       export PATH="$PATH:$PWD/opt/bin"
-      ./build-cross-compiler.sh
+      NIX_ENFORCE_PURITY=0 ./build-cross-compiler.sh # Stupid fucking shit hack
       '';
     # Add glibc, clang, glib, and other headers to bindgen search path
     BINDGEN_EXTRA_CLANG_ARGS =