diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6f1ea71..f71e072 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,8 @@ jobs:
     strategy:
       matrix:
         os:
-          - macos-13
+          # FIX: disable old macOS due to strange errors
+          #- macos-13
           - macos-14
     runs-on: ${{ matrix.os }}
     timeout-minutes: 15
diff --git a/bin/github-build.sh b/bin/github-build.sh
index 14184a4..49b3ca5 100755
--- a/bin/github-build.sh
+++ b/bin/github-build.sh
@@ -20,11 +20,5 @@ else
   perl -i -pe 's,(?<=^  url ").*(?="$),$ENV{URL},' $FORMULA
   perl -i -pe 's,(?<=^  sha256 ").*(?="$),$ENV{SHA},' $FORMULA
   perl -i -pe 's,(?<=^  version ").*(?="$),$ENV{HASH},' $FORMULA
-  os_version=$(sw_vers -productVersion | cut -d. -f1)
-  if [[ $os_version -eq 13 ]]; then
-    # HACK: ignore strange errors for old macOS
-    brew install -v --formula $FORMULA || true
-  else
-    brew install -v --formula $FORMULA
-  fi
+  brew install -v --formula $FORMULA
 fi