diff --git a/action.yml b/action.yml
index 3afba9e..9121478 100644
--- a/action.yml
+++ b/action.yml
@@ -45,16 +45,6 @@ inputs:
     description: |
       Don't use. For bootstrapping purposes only.
 
-  load_nixConfig:
-    default: true
-    description: |
-      Reads out a flakes 'nixConfig' attribute, if there is one, and loads
-      it into the environment config for old-style commands (`nix-build`,
-      `nix-store` etc) to pick it up.
-
-      If this cause undesired behaviour, you can switch it off by setting
-      this to false.
-
 
 runs:
   using: "composite"
@@ -70,16 +60,6 @@ runs:
         NIX_ON_TMPFS: ${{ inputs.nix_on_tmpfs }}
         GITHUB_ACCESS_TOKEN: ${{ inputs.github_access_token }}
 
-    - name: Preload nixConfig from Flake
-      run: ${{ github.action_path }}/read-nix-config-from-flake.sh
-      shell: bash
-      env:
-        LOAD_NIXCONFIG: ${{ inputs.load_nixConfig }}
-        NIX_VERSION: ${{ inputs.nix_version }}
-        GH_TOKEN: ${{ inputs.github_access_token }} # used by gh cli
-        OWNER_AND_REPO: ${{ github.repository }}
-        SHA: ${{ github.sha }}
-
 branding:
   icon: zap
   color: gray-dark
diff --git a/read-nix-config-from-flake.sh b/read-nix-config-from-flake.sh
deleted file mode 100755
index fe946eb..0000000
--- a/read-nix-config-from-flake.sh
+++ /dev/null
@@ -1,57 +0,0 @@
-#!/usr/bin/env bash
-
-set -eu
-set -o pipefail
-
-# Exit early if config loading has not been enabled
-[[ "$LOAD_NIXCONFIG" == "true"
-|| "$LOAD_NIXCONFIG" == "True"
-|| "$LOAD_NIXCONFIG" == "TRUE"
-]] || exit 0
-
-source "${BASH_SOURCE[0]%/*}/vercomp.sh"
-if verlte "$NIX_VERSION" "2.13"; then
-  echo "Do not load flake config on nix version <= 2.13"
-  exit 0
-fi
-
-NIX_CONF_FILE="${XDG_CONFIG_HOME:-$HOME/.config}/nix/nix.conf"
-
-declare nix_conf
-tmp="$(mktemp)"
-
-flake_file=${flake_file:="$tmp"}
-flake_url=${flake_url:="github:$OWNER_AND_REPO/$SHA"}
-
-# only fetch if not (locally) defined (e.g. for testing)
-if [ "$flake_file" = "$tmp" ]; then
-  gh_err="$(mktemp)"
-  gh_out="$(mktemp)"
-  gh api 2>"$gh_err" >"$gh_out" \
-    -H "Accept: application/vnd.github+json" \
-    -H "X-GitHub-Api-Version: 2022-11-28" \
-    "/repos/$OWNER_AND_REPO/contents/flake.nix?ref=$SHA" || true
-  gh_ec=$?
-  if grep -q "HTTP 404" "$gh_err"; then
-    echo >&2 "No flake.nix found, not loading config"
-    exit 0
-  else
-    if [ "$gh_ec" -ne 0 ]; then
-      echo >&2 "Error when fetching flake.nix: ($gh_ec) $(cat "$gh_err")"
-      cat >&2 "$gh_out"
-      exit 1
-    elif ! jq -r '.content|gsub("[\n\t]"; "")|@base64d' "$gh_out" >"$flake_file"; then
-      echo >&2 "Error when parsing flake.nix"
-      cat >&2 "$gh_err"
-      cat >&2 "$gh_out"
-      exit 1
-    fi
-  fi
-fi
-
-nix_conf="$(mktemp -d)/flake-nixConfig.conf"
-NIX_CONFIG=$(nix --experimental-features "nix-command" eval --raw --impure --expr '(import '"$flake_file"').nixConfig or {}' --apply "$(<"${BASH_SOURCE[0]%/*}/nix_config.nix")" | tee "$nix_conf")
-
-NIX_USER_CONF_FILES="$nix_conf:$NIX_CONF_FILE:${NIX_USER_CONF_FILES:-}"
-
-echo "NIX_USER_CONF_FILES=$NIX_USER_CONF_FILES" >> $GITHUB_ENV