diff --git a/bootstrap.sh b/bootstrap.sh
old mode 100644
new mode 100755
index 39ace02..803b9c8
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 # Bootstrapping nix and configuring nix to the point it can configure the rest
 # `chmod u+x` after git clone (change mode) to make file executable (+x) for current user (u)
 echo "Copying nix.conf to ~/.config/nix/"
@@ -5,14 +6,18 @@ mkdir -p ~/.config/nix/
 cp ./nix.conf ~/.config/nix/
 
 echo "Downloading & verifying nix install script"
-NIX_VERSION = "2.24.6"
+NIX_VERSION=2.24.6
 # --location follow redirect
 # --fail fail on bad HTTP code
-INSTALL_SCRIPT = $(curl --location --fail -v https://releases.nixos.org/nix/nix-$NIX_VERSION/install)
-ACTUAL_HASH = $(echo "$INSTALL_SCRIPT" | openssl dgst -sha256)
-EXPECTED_HASH = "idk"
-if ["$ACTUAL_HASH" != "$EXPECTED_HASH"]; then
-    echo "Error: Invalid hash for nix install script. Expected: $EXPECTED_HASH Got: $ACTUAL_HASH"
+URL=https://releases.nixos.org/nix/nix-$NIX_VERSION/install
+
+INSTALL_SCRIPT=$(curl --location --fail -v "$URL")
+ACTUAL_HASH=$(echo "$INSTALL_SCRIPT" | openssl dgst -sha256)
+
+EXPECTED_HASH=9f4535a9e90ab72874cf20ee1f9d41a130b16a56519dc3eec729540fcc78316f
+# The whitespace in bash matters
+if [ "$ACTUAL_HASH" != "$EXPECTED_HASH" ]; then
+    echo "Error: Invalid hash for nix install script. Version: $NIX_VERSION Expected: $EXPECTED_HASH Got: $ACTUAL_HASH"
     exit 1
 else
     echo "Hash matches"