diff --git a/gnu/packages/ncdu.scm b/gnu/packages/ncdu.scm
index feea8f8819..7e47314351 100644
--- a/gnu/packages/ncdu.scm
+++ b/gnu/packages/ncdu.scm
@@ -97,7 +97,7 @@ (define-public ncdu
                (when tests?
                  (invoke "zig" "test" "build.zig")))))))
     (native-inputs
-     (list perl zig))))
+     (list perl zig-0.9))))
 
 (define-public ncdu-2
   (deprecated-package "ncdu2" ncdu))
diff --git a/gnu/packages/zig-xyz.scm b/gnu/packages/zig-xyz.scm
index 3812aa0125..fd42c21638 100644
--- a/gnu/packages/zig-xyz.scm
+++ b/gnu/packages/zig-xyz.scm
@@ -41,7 +41,7 @@ (define-public zig-zls
                (base32
                 "1hhs7dz9rpshfd1a7x5swmix2rmh53vsqskh3mzqlrj2lgb3cnii"))))
     (build-system gnu-build-system)
-    (inputs (list zig python))
+    (inputs (list zig-0.9 python))
     (arguments
      (list #:phases #~(modify-phases %standard-phases
                         (delete 'configure)
diff --git a/gnu/packages/zig.scm b/gnu/packages/zig.scm
index cda93bed2e..b30e691bc5 100644
--- a/gnu/packages/zig.scm
+++ b/gnu/packages/zig.scm
@@ -2,7 +2,7 @@
 ;;; Copyright © 2021 Liliana Marie Prikler <liliana.prikler@gmail.com>
 ;;; Copyright © 2021 Sarah Morgensen <iskarian@mgsn.dev>
 ;;; Copyright © 2021 Calum Irwin <calumirwin1@gmail.com>
-;;; Copyright © 2022 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2022, 2023 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -25,12 +25,14 @@ (define-module (gnu packages zig)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix build-system cmake)
   #:use-module (gnu packages)
+  #:use-module (gnu packages bootstrap)
+  #:use-module (gnu packages compression)
   #:use-module (gnu packages llvm))
 
-(define-public zig
+(define-public zig-0.10
   (package
     (name "zig")
-    (version "0.9.1")
+    (version "0.10.1")
     (source
      (origin
        (method git-fetch)
@@ -39,21 +41,25 @@ (define-public zig
              (commit version)))
        (file-name (git-file-name name version))
        (sha256
-        (base32 "0nfvgg23sw50ksy0z0ml6lkdsvmd0278mq29m23dbb2jsirkhry7"))
-       (patches (search-patches "zig-use-system-paths.patch"))))
+        (base32 "1sh5xjsksl52i4cfv1qj36sz5h0ln7cq4pdhgs3960mk8a90im7b"))))
     (build-system cmake-build-system)
     (inputs
-     (list clang-13 ; Clang propagates llvm.
-           lld-13))
+     (list clang-15 ; Clang propagates llvm.
+           lld-15
+           zlib
+           (list zstd "lib")))
     ;; Zig compiles fine with GCC, but also needs native LLVM libraries.
     (native-inputs
-     (list llvm-13))
+     (list llvm-15))
     (arguments
      `(#:configure-flags
        (list ,@(if (%current-target-system)
-                   (string-append "-DZIG_TARGET_TRIPLE="
-                                  (%current-target-system))
-                   '()))
+                   '(string-append "-DZIG_TARGET_TRIPLE="
+                                   (%current-target-system))
+                   '())
+             (string-append "-DZIG_LIB_DIR=" (assoc-ref %outputs "out")
+                            "/lib/zig"))
+       #:validate-runpath? #f       ; TODO: zig binary can't find ld-linux.
        #:out-of-source? #f ; for tests
        #:phases
        (modify-phases %standard-phases
@@ -62,17 +68,20 @@ (define-public zig
              ;; Set cache dir, otherwise Zig looks for `$HOME/.cache'.
              (setenv "ZIG_GLOBAL_CACHE_DIR"
                      (string-append (getcwd) "/zig-cache"))))
+         (add-after 'patch-source-shebangs 'patch-more-shebangs
+           (lambda* (#:key inputs #:allow-other-keys)
+             ;; Zig uses information about /usr/bin/env to determine the
+             ;; version of glibc and other data.
+             (substitute* "lib/std/zig/system/NativeTargetInfo.zig"
+               (("/usr/bin/env") (search-input-file inputs "/bin/env")))))
          (delete 'check)
          (add-after 'install 'check
            (lambda* (#:key outputs tests? #:allow-other-keys)
              (when tests?
                (invoke (string-append (assoc-ref outputs "out") "/bin/zig")
-                       ;; Testing the standard library takes >7.5GB RAM, and
-                       ;; will fail if it is OOM-killed.  The 'test-toolchain'
-                       ;; target skips standard library and doc tests.
-                       "build" "test-toolchain"
-                       ;; Stage 2 is experimental, not what we run with `zig',
-                       ;; and stage 2 tests require a lot of RAM.
+                       "build" "test"
+                       ;; We're not testing the compiler bootstrap chain.
+                       "-Dskip-stage1"
                        "-Dskip-stage2-tests"
                        ;; Non-native tests try to link and execute non-native
                        ;; binaries.
@@ -100,7 +109,60 @@ (define-public zig
 @item concurrency via async functions.
 @end itemize")
     (home-page "https://github.com/ziglang/zig")
+    (license license:expat)))
+
+(define-public zig-0.9
+  (package
+    (inherit zig-0.10)
+    (name "zig")
+    (version "0.9.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/ziglang/zig.git")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0nfvgg23sw50ksy0z0ml6lkdsvmd0278mq29m23dbb2jsirkhry7"))
+       (patches (search-patches "zig-use-system-paths.patch"))))
+    (inputs
+     (list clang-13 ; Clang propagates llvm.
+           lld-13))
+    ;; Zig compiles fine with GCC, but also needs native LLVM libraries.
+    (native-inputs
+     (list llvm-13))
+    (arguments
+     `(#:configure-flags
+       (list ,@(if (%current-target-system)
+                   (string-append "-DZIG_TARGET_TRIPLE="
+                                  (%current-target-system))
+                   '()))
+       #:out-of-source? #f ; for tests
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'configure 'set-cache-dir
+           (lambda _
+             ;; Set cache dir, otherwise Zig looks for `$HOME/.cache'.
+             (setenv "ZIG_GLOBAL_CACHE_DIR"
+                     (string-append (getcwd) "/zig-cache"))))
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key outputs tests? #:allow-other-keys)
+             (when tests?
+               (invoke (string-append (assoc-ref outputs "out") "/bin/zig")
+                       ;; Testing the standard library takes >7.5GB RAM, and
+                       ;; will fail if it is OOM-killed.  The 'test-toolchain'
+                       ;; target skips standard library and doc tests.
+                       "build" "test-toolchain"
+                       ;; Stage 2 is experimental, not what we run with `zig',
+                       ;; and stage 2 tests require a lot of RAM.
+                       "-Dskip-stage2-tests"
+                       ;; Non-native tests try to link and execute non-native
+                       ;; binaries.
+                       "-Dskip-non-native")))))))
     ;; Currently building zig can take up to 10GB of RAM for linking stage1:
     ;; https://github.com/ziglang/zig/issues/6485
-    (supported-systems %64bit-supported-systems)
-    (license license:expat)))
+    (supported-systems %64bit-supported-systems)))
+
+(define-public zig zig-0.10)
