diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 895b6aa..13b4a5f 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -29,6 +29,10 @@ jobs:
       matrix:
         os: [macos-12, macos-14]
     runs-on: ${{ matrix.os }}
+    env:
+      BASE_REL: 0.9.20240202
+      BASE_SRC:
+        https://github.com/rdavid/shellbase/archive/refs/tags/v$REL.tar.gz
     steps:
       - uses: actions/checkout@v4
       - run: |
@@ -40,14 +44,12 @@ jobs:
             typos-cli \
             vale \
             yamllint
-          REL=0.9.20240202
-          SRC=https://github.com/rdavid/shellbase/archive/refs/tags/v$REL.tar.gz
-          curl --location --silent $SRC |
+          curl --location --silent $BASE_SRC |
             tar \
               --directory /usr/local/bin \
               --extract \
               --gzip \
               --strip-components=2 \
-              shellbase-$REL/lib/base.sh
+              shellbase-$BASE_REL/lib/base.sh
           vale sync
           redo -xx lint