Add path separator.

.github/workflows/test.yml

@@ -38,6 +38,9 @@ jobs:
       - name: Test the project
         shell: cmd
         run: build_win test
+      - name: Test installer build
+        shell: cmd
+        run: build_win dist
 
   test-windows-min:
     name: Build and test on Windows Minimal build

build_win.bat

@@ -138,7 +138,8 @@ if defined APPVEYOR_REPO_TAG_NAME (
     set RELEASE_VERSION=%JANET_VERSION%
 )
 if defined CI (
-    set WIXBIN="c:\Program Files (x86)\WiX Toolset v3.11\bin\"
+    set WIXBIN="%WIX%bin\"
+    echo WIXBIN = %WIXBIN%
 ) else (
     set WIXBIN=
 )