diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 50eb52e..dce5edb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,19 +1,38 @@
 name: ci
 on: [push, pull_request, workflow_dispatch]
 
+env:
+  GHIDRA_INSTALL_DIR: /home/runner/ghidra
+
 jobs:
   build_and_test:
     name: Build + test
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ghidra:
-          - "11.0"
-          - "10.4"
-          - "10.3.3"
-          - "10.3.2"
-          - "10.3.1"
-          - "10.3"
+        include:
+          - ghidra_version: "11.0"
+            ghidra_build_date: "20231222"
+            ghidra_sha256: "f1f240f91cf6b1dffc9a4148384ee3c6b269a8ae27c6f981577973e00043ad94"
+          - ghidra_version: "10.4"
+            ghidra_build_date: "20230928"
+            ghidra_sha256: "6911d674798f145f8ea723fdd3eb67a8fae8c7be92e117bca081e6ef66acac19"
+          - ghidra_version: "10.3.3"
+            ghidra_build_date: "20230829"
+            ghidra_sha256: "63833361bea8ef5ada1bc28cd2aa2ae4ab43204d2672b595500372582152eebe"
+          - ghidra_version: "10.3.2"
+            ghidra_build_date: "20230711"
+            ghidra_sha256: "a658677a87d0be12ab65bd7962f471875b81a2dd2ea35d69cc3201555ca1bd6f"
+          - ghidra_version: "10.3.1"
+            ghidra_build_date: "20230614"
+            ghidra_sha256: "0413b679436039cc136b950a6d8c24e80ce79da0a0a48993dfacee671b1c7974"
+          - ghidra_version: "10.3"
+            ghidra_build_date: "20230510"
+            ghidra_sha256: "4e990af9b22be562769bb6ce5d4d609fbb45455a7a2f756167b8cdcdb75887fc"
+    env:
+      GHIDRA_VERSION: ${{ matrix.ghidra_version }}
+      GHIDRA_BUILD_DATE: ${{ matrix.ghidra_build_date }}
+      GHIDRA_SHA256: ${{ matrix.ghidra_sha256 }}
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v4
@@ -21,14 +40,12 @@ jobs:
           distribution: 'temurin'
           java-version: '17'
           cache: 'gradle'
-      - uses: antoniovazquezblanco/setup-ghidra@v1.2.0
-        with:
-          auth_token: ${{ secrets.GITHUB_TOKEN }}
-          version: ${{ matrix.ghidra }}
-      - run: ./gradlew build -PGHIDRA_INSTALL_DIR=${{ env.GHIDRA_INSTALL_DIR }}
+      - name: Install Ghidra
+        run: .github/scripts/install_ghidra.sh
+      - run: ./gradlew build
       - uses: actions/upload-artifact@v4
         with:
-          name: GhidraBoy_Ghidra_${{ matrix.ghidra }}
+          name: GhidraBoy_Ghidra_${{ matrix.ghidra_version }}
           path: build/distributions/*_GhidraBoy.zip
           if-no-files-found: 'error'
   release: