diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6cd7c23..9940c28 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -44,20 +44,20 @@ jobs:
       with:
         path: _build
         key: "_build-cache-for\
-              -os-${{runner.os}}\
-              -otp-${{steps.setup-beam.outputs.otp-version}}\
-              -rebar3-${{steps.setup-beam.outputs.rebar3-version}}\
-              -hash-${{hashFiles('rebar.lock')}}"
+              -os-${{ matrix.os }}\
+              -otp-${{ steps.setup-beam.outputs.otp-version }}\
+              -rebar3-${{ steps.setup-beam.outputs.rebar3-version }}\
+              -hash-${{ hashFiles('rebar.lock') }}"
 
     - name: Restore rebar3's cache
       uses: actions/cache@v3
       with:
         path: ~/.cache/rebar3
         key: "rebar3-cache-for\
-              -os-${{runner.os}}\
-              -otp-${{steps.setup-beam.outputs.otp-version}}\
-              -rebar3-${{steps.setup-beam.outputs.rebar3-version}}\
-              -hash-${{hashFiles('rebar.lock')}}"
+              -os-${{ matrix.os }}\
+              -otp-${{ steps.setup-beam.outputs.otp-version }}\
+              -rebar3-${{ steps.setup-beam.outputs.rebar3-version }}\
+              -hash-${{ hashFiles('rebar.lock') }}"
 
     - name: Compile
       run: rebar3 compile