diff --git a/.github/workflows/build-git-installers.yml b/.github/workflows/build-git-installers.yml
index 23f0066d18b4f5..1da39551d3b684 100644
--- a/.github/workflows/build-git-installers.yml
+++ b/.github/workflows/build-git-installers.yml
@@ -690,6 +690,15 @@ jobs:
           # Install debsigs
           sudo apt-get install -y debsigs
 
+          # Stop using SHA-1 for the signature. For details, see
+          # https://gitlab.com/debsigs/debsigs/-/commit/75c6c8f96e6cdc33bca9c5f32195b68ff35bc32f
+          # which seems to have made it to have made it into debsigs v0.2.1, but Ubuntu 24.04 is
+          # stuck with v1.19.
+          mkdir -p patched-debsigs &&
+          sed 's/, "--openpgp"//' </usr/bin/debsigs >patched-debsigs/debsigs &&
+          chmod a+x patched-debsigs/debsigs &&
+          echo "$PWD/patched-debsigs" >>$GITHUB_PATH
+
           # Import GPG key
           echo -n '${{ steps.gpg-secrets.outputs.private-key }}' | gpg --import --no-tty --batch --yes