ci: Fix Clang 9 build on GitHub Actions (#641)

The name of the clang-9 package was missing, so it was not installed.
boostorg · Apr 7, 2022 · a38f890 · a38f890
1 parent bb080b5
commit a38f890
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -93,6 +93,7 @@ jobs:
             compiler: clang++-9
             cxxstd: "11,14,17,2a"
             os: ubuntu-20.04
+            install: clang-9
           - toolset: clang
             compiler: clang++-10
             cxxstd: "11,14,17,2a"