diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 70816ddf20..11fac6c7d5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -92,6 +92,10 @@ jobs:
 
     runs-on: ${{ matrix.os }}
 
+    env:
+      # Only sign/notarize if the secrets will be available
+      SIGN_INSTALLER: ${{ github.repository == 'SasView/sasview') && 'true' || '' }}
+
     steps:
       - name: Configuration of this job
         run: |
@@ -271,7 +275,7 @@ jobs:
           tar zcf sasview6.tar.gz sasview
 
       - name: Sign executable and create dmg (OSX)
-        if: ${{ matrix.installer && startsWith(matrix.os, 'macos') }}
+        if: ${{ matrix.installer && startsWith(matrix.os, 'macos') && env.SIGN_INSTALLER }}
         env:
           MACOS_CERTIFICATE: ${{ secrets.MACOS_CERTIFICATE_ISA }}
           MACOS_CERTIFICATE_PWD: ${{ secrets.MACOS_CERTIFICATE_ISA_PWD }}
@@ -292,7 +296,7 @@ jobs:
           codesign -s "Developer ID Application: The International Scattering Alliance (8CX8K63BQM)" SasView6.dmg
 
       - name: Notarize Release Build (OSX)
-        if: ${{ matrix.installer && startsWith(matrix.os, 'macos') }}
+        if: ${{ matrix.installer && startsWith(matrix.os, 'macos') && env.SIGN_INSTALLER }}
         uses: lando/notarize-action@v2
         with:
           product-path: "installers/dist/SasView6.dmg"
@@ -303,13 +307,13 @@ jobs:
           verbose: True
 
       - name: Staple Release Build (OSX)
-        if: ${{ matrix.installer && startsWith(matrix.os, 'macos') }}
+        if: ${{ matrix.installer && startsWith(matrix.os, 'macos') && env.SIGN_INSTALLER }}
         uses: BoundfoxStudios/action-xcode-staple@v1
         with:
           product-path: "installers/dist/SasView6.dmg"
 
       - name: Sign binary
-        if: ${{ matrix.installer && startsWith(matrix.os, 'windows') }}
+        if: ${{ matrix.installer && startsWith(matrix.os, 'windows') && env.SIGN_INSTALLER }}
         uses: lando/code-sign-action@v2
         with:
           file: installers/dist/setupSasView.exe