diff --git a/pkgs/by-name/ng/ngn-k/package.nix b/pkgs/by-name/ng/ngn-k/package.nix
index 76ff50b64b9e..4268f816f087 100644
--- a/pkgs/by-name/ng/ngn-k/package.nix
+++ b/pkgs/by-name/ng/ngn-k/package.nix
@@ -3,48 +3,38 @@
 , stdenvNoLibs
 , fetchFromGitea
 , runtimeShell
-, doCheck ? withLibc && stdenv.hostPlatform == stdenv.buildPlatform
-, withLibc ? true
 }:
 
-let
-  # k itself can be compiled with -ffreestanding, but tests require a libc;
-  # if we want to build k-libc we need a libc obviously
-  useStdenv = if withLibc || doCheck then stdenv else stdenvNoLibs;
-in
-
-useStdenv.mkDerivation {
+stdenv.mkDerivation {
   pname = "ngn-k";
-  version = "unstable-2022-11-28";
+  version = "0-unstable-2025-01-04";
 
   src = fetchFromGitea {
     domain = "codeberg.org";
     owner = "ngn";
     repo = "k";
-    rev = "e5138f182a8ced07dd240e3fe58274130842a85d";
-    sha256 = "1pn416znrdndb8iccprzx4zicmsx8c6i9dm3wq5z3jg8nan53p69";
+    rev = "feb51a61443dac03213c4e97edd8df679a4a3aaa";
+    sha256 = "14v2bwbgaxi1rsq5xabp5dmv0bl0vga3lhzwdxyvsyl9q7qybf55";
   };
 
   patches = [
     ./repl-license-path.patch
+    ./repl-argv-1.patch
   ];
 
   postPatch = ''
-    patchShebangs --build a19/a.sh a20/a.sh a21/a.sh dy/a.sh e/a.sh
-
     # don't use hardcoded /bin/sh
-    for f in repl.k repl-bg.k m.c;do
-      substituteInPlace "$f" --replace "/bin/sh" "${runtimeShell}"
+    for f in repl.k m.c;do
+      substituteInPlace "$f" --replace-fail "/bin/sh" "${runtimeShell}"
     done
   '';
 
   makeFlags = [ "-e" ];
   buildFlags = [
-    (if withLibc then "k-libc" else "k")
+    "k"
     "libk.so"
   ];
   checkTarget = "t";
-  inherit doCheck;
 
   outputs = [ "out" "dev" "lib" ];
 
@@ -56,7 +46,7 @@ useStdenv.mkDerivation {
     install -Dm755 libk.so "$lib/lib/libk.so"
     install -Dm644 k.h "$dev/include/k.h"
     install -Dm644 LICENSE -t "$out/share/ngn-k"
-    substituteInPlace "$out/bin/k-repl" --replace "#!k" "#!$out/bin/k"
+    substituteInPlace "$out/bin/k-repl" --replace-fail "#!k" "#!$out/bin/k"
     runHook postInstall
   '';
 
diff --git a/pkgs/by-name/ng/ngn-k/repl-argv-1.patch b/pkgs/by-name/ng/ngn-k/repl-argv-1.patch
new file mode 100644
index 000000000000..0e54a0845e4a
--- /dev/null
+++ b/pkgs/by-name/ng/ngn-k/repl-argv-1.patch
@@ -0,0 +1,13 @@
+diff --git a/repl.k b/repl.k
+index dc89832c..33780850 100755
+--- a/repl.k
++++ b/repl.k
+@@ -28,7 +28,7 @@ joinpath:{$[x~,".";y;"/"~*|x;x,y;x,"/",y]}
+ line0:{c:{0x07~*-2#*x}{(l;r):x;(1:1;r,,(-2_l))}/(x;());"\n"/(*|c),,*c}
+ line1:{$[#x;;:0];x:-1_x;$[(3>#x)&("\\"=*x)&~^(!cmds)?x 1;cmds[x 1]x 1;.[`1:(fmt;fmtx)[" "~*x]@.:;,x;{`0:`err[]}]];`1:prompt;1}
+ line:line1@line0@
+-$["repl.k"~basename`argv 1;{cmds::@[cmds;x[1]1;:;{y;`0:x}2_x]}'{(&x~\:80#"-")_x:(1+*&x~\:,"/")_-1_x}@0:`argv 1;];
++$["k-repl"~basename`argv 1;{cmds::@[cmds;x[1]1;:;{y;`0:x}2_x]}'{(&x~\:80#"-")_x:(1+*&x~\:,"/")_-1_x}@0:`argv 1;];
+ run:{`1:banner,prompt;{line@1:`}::/`;}
+ \d .
+ 
diff --git a/pkgs/by-name/ng/ngn-k/repl-license-path.patch b/pkgs/by-name/ng/ngn-k/repl-license-path.patch
index 17b998db187e..d3cd8c781b6b 100644
--- a/pkgs/by-name/ng/ngn-k/repl-license-path.patch
+++ b/pkgs/by-name/ng/ngn-k/repl-license-path.patch
@@ -1,13 +1,13 @@
 diff --git a/repl.k b/repl.k
-index 4c023467..10414162 100755
+index dc89832c..7a6e0dcf 100755
 --- a/repl.k
 +++ b/repl.k
-@@ -2,7 +2,7 @@
- `1:"ngn/k, (c) 2019-2022 ngn, GNU AGPLv3. type \\ for more info\n"
- \d repl
- `1:prompt:," " /use 0x0720 for emacs integration
+@@ -21,7 +21,7 @@ tbl:{[w;u;x]h:`k'!x;d:`k''.x;W:(#'h)|/'#''d
+  r,par'dd[w-2]'sem/'+@[W;&~^`i`d?_@'.x;-:]$'d}
+ cell:{$[|/`i`d=@y;-x;x]$z}
+ par:{opn,x,cls}
 -cmds:(,"a")!{`1:1:joinpath[dirname`argv 0]"LICENSE";}
 +cmds:(,"a")!{`1:1:joinpath[dirname`argv 0]"../share/ngn-k/LICENSE";}
+ basename:{*|"/"\x}
  dirname:{$[#x:"/"/-1_"/"\x;x;,"."]}
  joinpath:{$[x~,".";y;"/"~*|x;x,y;x,"/",y]}
- fmt:{$[x~(::);"";(`A~@x)&1<#x;"(",("\n "/`k'x),")\n";`k[x],"\n"]}