build: use l3build wrapper

.github/workflows/ci.yml

@@ -15,9 +15,9 @@ jobs:
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - name: document
-        run: nix develop --command l3build doc
+        run: nix develop --command l3build-wrapper doc
       - name: build
-        run: nix develop --command l3build ctan -q -H --show-log-on-error
+        run: nix develop --command l3build-wrapper ctan -q -H --show-log-on-error
   release:
     if: ${{ github.ref == 'refs/heads/main' }}
     permissions:

flake.nix

@@ -33,15 +33,20 @@
             microtype
             ;
         };
+        l3build-wrapped = pkgs.writeShellScriptBin "l3build-wrapped" ''
+          # NOTE: the trailing slash in TEXMF is required
+          TEXMF="${texlive}/" ${texlive}/bin/l3build "$@"
+        '';
       in
       {
         devShells.default = pkgs.mkShell {
           buildInputs = [
             texlive
+            l3build-wrapped
           ];
-          shellHook = ''
+          # shellHook = ''
-            export TEXMF="${texlive}/"
+          #   export TEXMF="${texlive}/"
-          '';
+          # '';
         };
       }
     );