diff --git a/pkgs/by-name/am/amber-lang/fix_word_boundaries.patch b/pkgs/by-name/am/amber-lang/fix_word_boundaries.patch
deleted file mode 100644
index ec73631eccae..000000000000
--- a/pkgs/by-name/am/amber-lang/fix_word_boundaries.patch
+++ /dev/null
@@ -1,38 +0,0 @@
-From efdbecaf721ccb217ece34a5105eaac68e27aa51 Mon Sep 17 00:00:00 2001
-From: Max Karou <maxkarou@protonmail.com>
-Date: Sun, 4 Jan 2026 01:47:51 +0100
-Subject: [PATCH] sed_version: remove word boundary assertions
-
-Word boundary assertions (\b) are GNU regex extensions that may fail
-on systems using non-glibc C libraries (e.g., musl, macOS).
-
-This was previously fixed in replace_regex() via NixOS/nixpkgs#388412,
-which was subsequently upstreamed in amber-lang/amber#686.
-
-Changes in amber-lang/amber#717 reintroduced the same portability issue.
----
- src/std/text.ab | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/src/std/text.ab b/src/std/text.ab
-index 5f2d935..a5dac3f 100644
---- a/src/std/text.ab
-+++ b/src/std/text.ab
-@@ -51,12 +51,12 @@ const SED_VERSION_BUSYBOX = 2
- fun sed_version(): Int {
-     // We can't match against a word "GNU" because
-     // alpine's busybox sed returns "This is not GNU sed version"
--    trust $ re='\bCopyright\b.+\bFree Software Foundation\b'; [[ \$(sed --version 2>/dev/null) =~ \$re ]] $
-+    trust $ re='Copyright.+Free Software Foundation'; [[ \$(sed --version 2>/dev/null) =~ \$re ]] $
-     if status == 0 {
-         return SED_VERSION_GNU
-     }
-     // On BSD single `sed` waits for stdin. We must use `sed --help` to avoid this.
--    trust $ re='\bBusyBox\b'; [[ \$(sed --help 2>&1) =~ \$re ]] $
-+    trust $ re='BusyBox'; [[ \$(sed --help 2>&1) =~ \$re ]] $
-     if status == 0 {
-         return SED_VERSION_BUSYBOX
-     }
--- 
-2.51.2
-
diff --git a/pkgs/by-name/am/amber-lang/package.nix b/pkgs/by-name/am/amber-lang/package.nix
index 40efcab57a60..f35e9b533e2f 100644
--- a/pkgs/by-name/am/amber-lang/package.nix
+++ b/pkgs/by-name/am/amber-lang/package.nix
@@ -4,7 +4,6 @@
   rustPlatform,
   bc,
   util-linux,
-  gnused,
   makeWrapper,
   installShellFiles,
   versionCheckHook,
@@ -12,31 +11,23 @@
   runCommand,
   amber-lang,
   nix-update-script,
+  bash,
+  ksh,
+  zsh,
 }:
 
 rustPlatform.buildRustPackage rec {
   pname = "amber-lang";
-  version = "0.5.1-alpha";
+  version = "0.6.0-alpha";
 
   src = fetchFromGitHub {
     owner = "amber-lang";
     repo = "amber";
     tag = version;
-    hash = "sha256-v1uJe3vVGKXaZcQzdoYzu/bJKMQnS4IYET4QLPW+J8Y=";
+    hash = "sha256-pyMsxb9XPtseroH2MORhMOg9+iaLyoxmgpUTCej+i+Y=";
   };
 
-  patches = [
-    # Upstreamed in #995, can be removed in >= 0.5.2
-    # github.com/amber-lang/amber/pull/995
-    ./fix_word_boundaries.patch
-  ];
-
-  cargoHash = "sha256-aXcxlmmDYLFbyRJYyGE1gbQMbdysHx4iWXsrUj10Eco=";
-
-  preConfigure = ''
-    substituteInPlace src/compiler.rs \
-      --replace-fail 'Command::new("/usr/bin/env")' 'Command::new("env")'
-  '';
+  cargoHash = "sha256-7TZIRg4NK2uOivUUg09T5mbxrNlRmmVyec2xhmzSNvY=";
 
   nativeBuildInputs = [
     makeWrapper
@@ -44,15 +35,23 @@ rustPlatform.buildRustPackage rec {
   ];
 
   nativeCheckInputs = [
+    bash
     bc
     # 'rev' in generated bash script of test
     # tests::validity::variable_ref_function_invocation
     util-linux
   ];
 
+  preCheck = ''
+    substituteInPlace src/tests/cli.rs \
+      --replace-fail 'Command::new(amber_bin())' "Command::new(\"target/${stdenv.targetPlatform.rust.cargoShortTarget}/$cargoBuildType/amber\")"
+    substituteInPlace src/tests/cli.rs \
+      --replace-fail 'cmd.env("AMBER_SHELL", "/bin/bash")' 'cmd.env("AMBER_SHELL", "bash")'
+  '';
+
   checkFlags = [
     "--skip=tests::extra::download"
-    "--skip=tests::formatter::all_exist"
+    "--skip=tests::stdlib::test_stdlib_src_tests_stdlib_http_fetch_ab"
   ];
 
   postInstall = ''
@@ -70,21 +69,39 @@ rustPlatform.buildRustPackage rec {
 
   passthru = {
     updateScript = nix-update-script { extraArgs = [ "--version=unstable" ]; };
-    tests.run = runCommand "amber-lang-eval-test" { nativeBuildInputs = [ amber-lang ]; } ''
-      diff -U3 --color=auto <(amber eval 'echo "Hello, World"') <(echo 'Hello, World')
-      touch $out
-    '';
+    tests =
+      let
+        testHelloWorld =
+          type: pkg:
+          runCommand "amber-lang-test-eval-hello-world-${type}"
+            {
+              nativeBuildInputs = [
+                amber-lang
+                pkg
+              ];
+            }
+            ''
+              diff -U3 --color=auto <(amber eval --target ${type} 'echo("Hello, World")') <(echo 'Hello, World')
+              touch $out
+            '';
+      in
+      {
+        eval-hello-world-bash = testHelloWorld "bash" bash;
+        eval-hello-world-bash-3_2 = testHelloWorld "bash-3.2" bash;
+        eval-hello-world-ksh = testHelloWorld "ksh" ksh;
+        eval-hello-world-zsh = testHelloWorld "zsh" zsh;
+      };
   };
 
   meta = {
     description = "Programming language compiled to bash";
     homepage = "https://amber-lang.com";
-    license = lib.licenses.gpl3Plus;
+    license = lib.licenses.lgpl3Only;
     mainProgram = "amber";
     maintainers = with lib.maintainers; [
       cafkafk
       aleksana
+      ilai-deutel
     ];
-    platforms = lib.platforms.unix;
   };
 }