diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 50a64ad..30aae13 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -39,13 +39,11 @@ jobs:
           # List the required TeX Live packages in a separate file to allow reuse in
           # different workflows.
           package_file: .github/tl_packages
-      - name: Remove environmental restrictions
-        run: sed -i '/^os\.setenv /d' $(find . -name "*.lua") 
       - name: Run l3build
         run: l3build ctan
         # https://github.com/latex3/hyperref/blob/adc36adbc3650db73329469b43afb0ee86e3c807/.github/workflows/main.yaml
       - name: Archive failed test output
-        # what does this do exactly?
+        # what does this do exactly? (runs even if previous fails)
         if: ${{ always() }}
         uses: zauguin/l3build-failure-artifacts@v1
         with:
diff --git a/build.lua b/build.lua
index f3dd5fb..ae9acd4 100755
--- a/build.lua
+++ b/build.lua
@@ -1,11 +1,6 @@
--- $Id: build.lua 10532 2024-10-26 02:39:56Z cfrees $
+-- $Id: build.lua 10572 2024-11-04 15:37:34Z cfrees $
 -- Build configuration for prooftrees
 --------------------------------------------------------------------------------
-os.setenv ("PATH", "/usr/local/texlive/bin:/usr/bin:")
-os.setenv ("TEXMFHOME", ".")
-os.setenv ("TEXMFLOCAL", ".")
-os.setenv ("TEXMFARCH", ".")
---------------------------------------------------------------------------------
 maindir = maindir or "."
 sourcedir = sourcedir or maindir
 --------------------------------------------------------------------------------