diff --git a/pkgs/development/interpreters/ngn-k/default.nix b/pkgs/development/interpreters/ngn-k/default.nix
new file mode 100644
index 00000000000..e70ac299214
--- /dev/null
+++ b/pkgs/development/interpreters/ngn-k/default.nix
@@ -0,0 +1,61 @@
+{ lib
+, stdenv
+, stdenvNoLibs
+, fetchFromGitea
+, runtimeShell
+, doCheck ? stdenv.hostPlatform == stdenv.buildPlatform
+}:
+
+let
+  # k itself is compiled with -ffreestanding, but tests require a libc
+  useStdenv = if doCheck then stdenv else stdenvNoLibs;
+in
+
+useStdenv.mkDerivation {
+  pname = "ngn-k";
+  version = "unstable-2021-08-30";
+
+  src = fetchFromGitea {
+    domain = "codeberg.org";
+    owner = "ngn";
+    repo = "k";
+    rev = "3e2bcb81c723e268015818570f2805547114b5dd";
+    sha256 = "0b16971xgf0sgx7qf41dilrpz02jnas61gfwkyvbxv18874w5vap";
+  };
+
+  patches = [
+    ./repl-license-path.patch
+  ];
+
+  postPatch = ''
+    # make self-reference for LICENSE
+    substituteAllInPlace repl.k
+
+    # don't use hardcoded /bin/sh
+    for f in repl.k m.c;do
+      substituteInPlace "$f" --replace "/bin/sh" "${runtimeShell}"
+    done
+  '';
+
+  makeFlags = [ "-e" ];
+  buildFlags = [ "k" ];
+  checkTarget = "t";
+  inherit doCheck;
+
+  installPhase = ''
+    runHook preInstall
+    install -Dm755 k "$out/bin/k"
+    install -Dm755 repl.k "$out/bin/k-repl"
+    install -Dm644 LICENSE -t "$out/share/ngn-k"
+    substituteInPlace "$out/bin/k-repl" --replace "#!k" "#!$out/bin/k"
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "A simple fast vector programming language";
+    homepage = "https://codeberg.org/ngn/k";
+    license = lib.licenses.agpl3Only;
+    maintainers = [ lib.maintainers.sternenseemann ];
+    platforms = [ "x86_64-linux" "x86_64-freebsd" ];
+  };
+}
diff --git a/pkgs/development/interpreters/ngn-k/repl-license-path.patch b/pkgs/development/interpreters/ngn-k/repl-license-path.patch
new file mode 100644
index 00000000000..1b0ce708f0c
--- /dev/null
+++ b/pkgs/development/interpreters/ngn-k/repl-license-path.patch
@@ -0,0 +1,14 @@
+diff --git a/repl.k b/repl.k
+index e4071e6..70ae276 100755
+--- a/repl.k
++++ b/repl.k
+@@ -3,8 +3,7 @@ repl.banner:"ngn/k, (c) 2019-2021 ngn, GNU AGPLv3. type \\ for more info\n"
+ repl.prompt:," "
+ repl.cmds:""!()
+ repl.cmds["vf"]:{` 0:($!h),'":",'`k'. h:(&(x~"v")=^`o`p`q`r`u`v`w?@'h)#h:``repl_.:0#`}
+-repl.cmds["a"]:{` 1:1:repl.basename[`argv 0],"/LICENSE";}
+-repl.basename:{$[#x:"/"/-1_"/"\x;x;,"."]}
++repl.cmds["a"]:{` 1:1:"@out@/share/ngn-k/LICENSE";}
+ repl.fmt:{$[x~(::);"";(`A~@x)&1<#x;"(",("\n "/`k'x),")\n";`k[x],"\n"]}
+ repl.line:{$[#x;;:0];x:-1_x;$[(3>#x)&("\\"=*x)&~^(!repl.cmds)?x 1;repl.cmds[x 1]x 1;.[` 1:repl.fmt@.:;,x;`epr@]];` 1:repl.prompt;1}
+ {repl.cmds[x[1]1]:{y;` 0:x}2_x}'{(&x~\:80#"-")_x:(1+*&x~\:,"/")_-1_x}@0:`argv 1;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2fb64395b14..cbcb9aeee2c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -13238,6 +13238,8 @@ with pkgs;
 
   mujs = callPackage ../development/interpreters/mujs { };
 
+  ngn-k = callPackage ../development/interpreters/ngn-k { };
+
   octave = callPackage ../development/interpreters/octave {
     python = python3;
     mkDerivation = stdenv.mkDerivation;