diff --git a/templates/gsl.ci.yml b/templates/gsl.ci.yml
index 055616d..6e7df14 100644
--- a/templates/gsl.ci.yml
+++ b/templates/gsl.ci.yml
@@ -646,7 +646,7 @@ endfunction # get_sln_tests
       - name: Prepare toolchain [brew]
         if: ${{ matrix.packager == 'brew' }} 
         run: |
-          brew install autoconf automake libtool pkg-config ${{ matrix.packages }}
+          brew install autoconf automake libtool ${{ matrix.packages }}
 .
 .endmacro # emit_step_prepare_toolchain
 .