Fix add_general_registry (#28)

.github/workflows/ci.yml

@@ -15,7 +15,6 @@ on:
 
 jobs:
   test:
-    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -31,6 +30,9 @@ jobs:
         arch:
           - x64
           - x86
+        pkg-server:
+          - ""
+          - "pkg.julialang.org"
         # 32-bit Julia binaries are not available on macOS
         exclude:
           - os: macOS-latest
@@ -68,6 +70,8 @@ jobs:
             ${{ runner.os }}-
 
       - uses: ./.github/actions/julia-buildpkg
+        env:
+          JULIA_PKG_SERVER: ${{ matrix.pkg-server }}
 
       - uses: julia-actions/julia-runtest@v1