try setting to false

Author: cknitt

.github/workflows/ci.yml

@@ -17,7 +17,6 @@ concurrency:
   cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 env:
-  GITHUB_ACTIONS: true
   OCAMLRUNPARAM: b
 
 jobs:
@@ -145,6 +144,8 @@ jobs:
       - name: Use OCaml ${{matrix.ocaml_compiler}}
         uses: ocaml/setup-ocaml@v2
         if: matrix.os != 'windows-latest'
+        env:
+          GITHUB_ACTIONS: false
         with:
           ocaml-compiler: ${{matrix.ocaml_compiler}}
           opam-pin: false