diff --git a/readme.md b/readme.md
index 9eafa28..c51ce97 100644
--- a/readme.md
+++ b/readme.md
@@ -340,7 +340,6 @@ Content-Type: application/json
 `haskell`,
 `husk`,
 `iverilog`,
-`j`,
 `japt`,
 `java`,
 `javascript`,
diff --git a/runtimes/default.nix b/runtimes/default.nix
index e8eb533..4624670 100644
--- a/runtimes/default.nix
+++ b/runtimes/default.nix
@@ -63,5 +63,4 @@ args: {
     "jvm-scala" = import ./jvm-scala.nix args;
     "llvm_ir" = import ./llvm_ir.nix args;
     "mono-basic" = import ./mono-basic.nix args;
-    "j" = import ./j.nix args;
 }
diff --git a/runtimes/j.nix b/runtimes/j.nix
deleted file mode 100644
index 730960b..0000000
--- a/runtimes/j.nix
+++ /dev/null
@@ -1,43 +0,0 @@
-{pkgs, piston, ...}:
-let
-    pkg = pkgs.j;
-in piston.mkRuntime {
-    language = "j";
-    version = pkg.version;
-
-    aliases = [
-        "ijs"
-    ];
-
-    run = ''
-    ${pkg}/bin/jconsole "$@"
-    '';
-
-    tests = [
-        (piston.mkTest {
-            files = {
-                "test.ijs" = ''
-                    echo'OK'
-                '';
-            };
-            args = [];
-            stdin = "";
-            packages = [];
-            main = "test.ijs";
-        })
-
-        (piston.mkTest {
-            files = {
-                "test.ijs" = ''
-                    stdout each |. 2}. ARGV
-                '';
-            };
-            args = ["K" "O"];
-            stdin = "";
-            packages = [];
-            main = "test.ijs";
-        })
-    ];
-}
-
-