diff --git a/pkgs/by-name/gp/gpac/package.nix b/pkgs/by-name/gp/gpac/package.nix
index 54b9e0b45eb9..f4ca21c8cd54 100644
--- a/pkgs/by-name/gp/gpac/package.nix
+++ b/pkgs/by-name/gp/gpac/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  cacert,
   gitUpdater,
   unstableGitUpdater,
   cctools,
@@ -112,6 +113,11 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
+  postInstall = ''
+    rm $out/share/gpac/res/ca-bundle.crt
+    ln -s ${cacert}/etc/ssl/certs/ca-bundle.crt $out/share/gpac/res/ca-bundle.crt
+  '';
+
   passthru.updateScript = channelToUse.updateScript;
 
   meta = {