diff --git a/pkgs/by-name/da/dap/package.nix b/pkgs/by-name/da/dap/package.nix
deleted file mode 100644
index f8f2177b4fa9..000000000000
--- a/pkgs/by-name/da/dap/package.nix
+++ /dev/null
@@ -1,38 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-}:
-
-stdenv.mkDerivation rec {
-  pname = "dap";
-  version = "3.10";
-
-  src = fetchurl {
-    url = "mirror://gnu/${pname}/${pname}-${version}.tar.gz";
-    sha256 = "Bk5sty/438jLb1PpurMQ5OqMbr6JqUuuQjcg2bejh2Y=";
-  };
-
-  hardeningDisable = [ "format" ];
-
-  meta = with lib; {
-    homepage = "https://www.gnu.org/software/dap";
-    description = "Small statistics and graphics package based on C";
-    longDescription = ''
-      Dap is a small statistics and graphics package based on C. Version 3.0 and
-      later of Dap can read SBS programs (based on the utterly famous, industry
-      standard statistics system with similar initials - you know the one I
-      mean)! The user wishing to perform basic statistical analyses is now freed
-      from learning and using C syntax for straightforward tasks, while
-      retaining access to the C-style graphics and statistics features provided
-      by the original implementation. Dap provides core methods of data
-      management, analysis, and graphics that are commonly used in statistical
-      consulting practice (univariate statistics, correlations and regression,
-      ANOVA, categorical data analysis, logistic regression, and nonparametric
-      analyses).
-    '';
-    license = licenses.gpl3Plus;
-    maintainers = with maintainers; [ ];
-    platforms = platforms.unix;
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 19a7a1e53627..ce47bb4bcdd7 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -496,6 +496,7 @@ mapAliases {
 
   ### D ###
 
+  dap = throw "'dap' has been removed because it doesn't compile and has been unmaintained since 2014"; # Added 2025-05-10
   dart_stable = throw "'dart_stable' has been renamed to/replaced by 'dart'"; # Converted to throw 2024-10-17
   dart-sass-embedded = throw "dart-sass-embedded has been removed from nixpkgs, as is now included in Dart Sass itself.";
   dat = nodePackages.dat;