diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index 421c8011cc00..29e826c88d66 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -219,25 +219,19 @@ let
 
 in
 rec {
-  binaryCrystal_0_36 = genericBinary {
-    version = "0.36.1";
+  binaryCrystal_1_0 = genericBinary {
+    version = "1.0.0";
     sha256s = {
-      x86_64-linux = "065vzq34g7hgzl2mrzy9gwwsfikc78nj7xxsbrk67r6rz0a7bk1q";
-      i686-linux = "18m4b1lnd682i5ygbg6cljqjny60nn2mlrzrk765h2ip6fljqbm1";
-      x86_64-darwin = "0xggayk92zh64pb5sz77n12hkcd1hg8kw90z7gb18594q551sf1v";
+      x86_64-linux = "1949argajiyqyq09824yj3wjyv88gd8wbf20xh895saqfykiq880";
+      i686-linux = "0w0f4fwr2ijhx59i7ppicbh05hfmq7vffmgl7lal6im945m29vch";
+      x86_64-darwin = "01n0rf8zh551vv8wq3h0ifnsai0fz9a77yq87xx81y9dscl9h099";
     };
   };
 
-  crystal_0_36 = generic {
-    version = "0.36.1";
-    sha256 = "sha256-5rjrvwZKM4lHpmxLyUVbi0Zw98xT+iJKonxwfUwS/Wk=";
-    binary = binaryCrystal_0_36;
-  };
-
   crystal_1_0 = generic {
     version = "1.0.0";
     sha256 = "sha256-RI+a3w6Rr+uc5jRf7xw0tOenR+q6qii/ewWfID6dbQ8=";
-    binary = crystal_0_36;
+    binary = binaryCrystal_1_0;
   };
 
   crystal_1_1 = generic {
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index fa31d5d737c0..ac02b28c2b17 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11279,7 +11279,6 @@ with pkgs;
   inherit (callPackages ../development/compilers/crystal {
     llvmPackages = llvmPackages_10;
   })
-    crystal_0_36
     crystal_1_0
     crystal_1_1
     crystal_1_2