diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index e18ca7a..9e0b076 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -12,9 +12,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest, windows-latest]
+        os: [macos-11.0, ubuntu-latest, windows-latest]
         include:
-          - os: macos-latest
+          - os: macos-11.0
             ARCH: macos-x86_64
           - os: ubuntu-latest
             ARCH: linux-x86_64
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index f8afcbb..b11a9d2 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest, windows-latest]
+        os: [macos-11.0, ubuntu-latest, windows-latest]
         python: [3.5, 3.6, 3.7, 3.8, 3.9]
     steps:
       - uses: actions/checkout@v1
diff --git a/gen/attrs.ts b/gen/attrs.ts
index 4d09f2a..071dbb9 100644
--- a/gen/attrs.ts
+++ b/gen/attrs.ts
@@ -83,9 +83,10 @@ ${(['html', 'svg'] as const).map(ns => `      ${ns}: ` + (() => {
   if (globalAttr) {
     return `Some(AttrMapEntry::AllNamespaceElements(${rsTagAttr(globalAttr)}))`;
   }
+  const entries = Object.entries(tagsMap);
   return `Some({
-        let mut m = HashMap::<&'static [u8], AttributeMinification>::new();
-${Object.entries(tagsMap).map(([tagName, tagAttr]) => `        m.insert(b\"${tagName}\", ${rsTagAttr(tagAttr)});`).join('\n')}
+        let ${entries.length ? 'mut' : ''} m = HashMap::<&'static [u8], AttributeMinification>::new();
+${entries.map(([tagName, tagAttr]) => `        m.insert(b\"${tagName}\", ${rsTagAttr(tagAttr)});`).join('\n')}
         AttrMapEntry::SpecificNamespaceElements(m)
       })`;
 })() + ',').join('\n')}
diff --git a/python/.cargo/config b/python/.cargo/config
index 15d5d32..d47f983 100644
--- a/python/.cargo/config
+++ b/python/.cargo/config
@@ -3,3 +3,9 @@ rustflags = [
   "-C", "link-arg=-undefined",
   "-C", "link-arg=dynamic_lookup",
 ]
+
+[target.aarch64-apple-darwin]
+rustflags = [
+  "-C", "link-arg=-undefined",
+  "-C", "link-arg=dynamic_lookup",
+]