diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index a0aa47a88151..f8195c2e7775 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -10,19 +10,16 @@
 , git
 , gmp
 , hostname
-, libatomic_ops
 , libevent
 , libiconv
 , libxml2
 , libyaml
 , libffi
-, llvmPackages_13
 , llvmPackages_15
 , llvmPackages_18
 , makeWrapper
 , openssl
 , pcre2
-, pcre
 , pkg-config
 , installShellFiles
 , readline
@@ -154,7 +151,7 @@ let
       nativeBuildInputs = [ binary makeWrapper which pkg-config llvmPackages.llvm installShellFiles ];
       buildInputs = [
         boehmgc
-        (if lib.versionAtLeast version "1.8" then pcre2 else pcre)
+        pcre2
         libevent
         libyaml
         zlib
@@ -245,16 +242,6 @@ let
     });
 in
 rec {
-  binaryCrystal_1_2 = genericBinary {
-    version = "1.2.2";
-    sha256s = {
-      x86_64-linux = "sha256-sW5nhihW/6Dkq95i3vJNWs2D1CtQhujhxVbgQCAas6E=";
-      aarch64-darwin = "sha256-4VB4yYGl1/YeYSsHOZq7fdeQ8IQMfloAPhEU0iKrvxs=";
-      x86_64-darwin = "sha256-4VB4yYGl1/YeYSsHOZq7fdeQ8IQMfloAPhEU0iKrvxs=";
-      aarch64-linux = "sha256-QgPKUDFyodqY1+b85AybSpbbr0RmfISdNpB08Wf34jo=";
-    };
-  };
-
   binaryCrystal_1_10 = genericBinary {
     version = "1.10.1";
     sha256s = {
@@ -265,35 +252,6 @@ rec {
     };
   };
 
-  crystal_1_2 = generic {
-    version = "1.2.2";
-    sha256 = "sha256-nyOXhsutVBRdtJlJHe2dALl//BUXD1JeeQPgHU4SwiU=";
-    binary = binaryCrystal_1_2;
-    llvmPackages = llvmPackages_13;
-    extraBuildInputs = [ libatomic_ops ];
-  };
-
-  crystal_1_7 = generic {
-    version = "1.7.3";
-    sha256 = "sha256-ULhLGHRIZbsKhaMvNhc+W74BwNgfEjHcMnVNApWY+EE=";
-    binary = binaryCrystal_1_2;
-    llvmPackages = llvmPackages_13;
-  };
-
-  crystal_1_8 = generic {
-    version = "1.8.2";
-    sha256 = "sha256-YAORdipzpC9CrFgZUFlFfjzlJQ6ZeA2ekVu8IfPOxR8=";
-    binary = binaryCrystal_1_2;
-    llvmPackages = llvmPackages_15;
-  };
-
-  crystal_1_9 = generic {
-    version = "1.9.2";
-    sha256 = "sha256-M1oUFs7/8ljszga3StzLOLM1aA4fSfVPQlsbuDHGd84=";
-    binary = binaryCrystal_1_2;
-    llvmPackages = llvmPackages_15;
-  };
-
   crystal_1_11 = generic {
     version = "1.11.2";
     sha256 = "sha256-BBEDWqFtmFUNj0kuGBzv71YHO3KjxV4d2ySTCD4HhLc=";
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index eca10fd76e63..eab448cc7a3c 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -250,6 +250,10 @@ mapAliases {
   cpp-ipfs-api = cpp-ipfs-http-client; # Project has been renamed. Added 2022-05-15
   crispyDoom = crispy-doom; # Added 2023-05-01
   crossLibcStdenv = stdenvNoLibc; # Added 2024-09-06
+  crystal_1_2 = throw "'crystal_1_2' has been removed as it is obsolete and no longer used in the tree. Consider using 'crystal' instead"; # Added 2025-02-13
+  crystal_1_7 = throw "'crystal_1_7' has been removed as it is obsolete and no longer used in the tree. Consider using 'crystal' instead"; # Added 2025-02-13
+  crystal_1_8 = throw "'crystal_1_8' has been removed as it is obsolete and no longer used in the tree. Consider using 'crystal' instead"; # Added 2025-02-13
+  crystal_1_9 = throw "'crystal_1_9' has been removed as it is obsolete and no longer used in the tree. Consider using 'crystal' instead"; # Added 2025-02-13
   clash-geoip = throw "'clash-geoip' has been removed. Consider using 'dbip-country-lite' instead."; # added 2024-10-19
   clash-verge = throw "'clash-verge' has been removed, as it was broken and unmaintained. Consider using 'clash-verge-rev' or 'clash-nyanpasu' instead"; # Added 2024-09-17
   clasp = clingo; # added 2022-12-22
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index eaa73723a1ab..c4f12eea38b5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5704,10 +5704,6 @@ with pkgs;
   };
 
   inherit (darwin.apple_sdk_11_0.callPackage ../development/compilers/crystal { })
-    crystal_1_2
-    crystal_1_7
-    crystal_1_8
-    crystal_1_9
     crystal_1_11
     crystal_1_12
     crystal_1_14