diff --git a/pkgs/applications/editors/emacs/elisp-packages/elpa-packages.nix b/pkgs/applications/editors/emacs/elisp-packages/elpa-packages.nix
index 94ca0cdf0b6d..3b19adfa1719 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/elpa-packages.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/elpa-packages.nix
@@ -69,7 +69,7 @@ self: let
                 then null
                 else super.project;
       # Compilation instructions for the Ada executables:
-      # https://www.nongnu.org/ada-mode/ada-mode.html#Ada-executables
+      # https://www.nongnu.org/ada-mode/
       ada-mode = super.ada-mode.overrideAttrs (old: {
         # actually unpack source of ada-mode and wisi
         # which are both needed to compile the tools
@@ -85,15 +85,18 @@ self: let
         nativeBuildInputs = [
           buildPackages.gnat
           buildPackages.gprbuild
-          buildPackages.lzip
+          buildPackages.dos2unix
+          buildPackages.re2c
         ];
 
         buildInputs = [
           pkgs.gnatcoll-xref
         ];
 
-        preInstall = ''
+        buildPhase = ''
+          runHook preBuild
           ./build.sh -j$NIX_BUILD_CORES
+          runHook postBuild
         '';
 
         postInstall = (old.postInstall or "") + "\n" + ''