diff --git a/pkgs/os-specific/darwin/mk-apple-derivation/default.nix b/pkgs/os-specific/darwin/mk-apple-derivation/default.nix
index cb06f5d639c6..9bd230eee5e9 100644
--- a/pkgs/os-specific/darwin/mk-apple-derivation/default.nix
+++ b/pkgs/os-specific/darwin/mk-apple-derivation/default.nix
@@ -1,13 +1,9 @@
-let
-  versions = builtins.fromJSON (builtins.readFile ./versions.json);
-in
-
 {
   lib,
   bootstrapStdenv,
-  fetchFromGitHub,
   meson,
   ninja,
+  sourceRelease,
   xcodeProjectCheckHook,
 }:
 
@@ -31,7 +27,7 @@ lib.extendMkDerivation {
     assert args ? releaseName;
     let
       inherit (args) releaseName;
-      info = versions.${releaseName};
+      releaseSrc = sourceRelease releaseName;
       files = lib.filesystem.listFilesRecursive (prependShardPath releaseName);
       mesonFiles = lib.filter (hasBasenamePrefix "meson") files;
     in
@@ -40,14 +36,9 @@ lib.extendMkDerivation {
     assert args ? xcodeHash -> lib.length mesonFiles > 0;
     {
       pname = args.pname or releaseName;
-      inherit (info) version;
+      inherit (releaseSrc) version;
 
-      src = args.src or fetchFromGitHub {
-        owner = "apple-oss-distributions";
-        repo = releaseName;
-        rev = info.rev or "${releaseName}-${info.version}";
-        inherit (info) hash;
-      };
+      src = args.src or releaseSrc;
 
       strictDeps = true;
       __structuredAttrs = true;
diff --git a/pkgs/os-specific/darwin/mk-apple-derivation/update-source-releases.sh b/pkgs/os-specific/darwin/mk-apple-derivation/update-source-releases.sh
deleted file mode 100755
index aa852d125a0d..000000000000
--- a/pkgs/os-specific/darwin/mk-apple-derivation/update-source-releases.sh
+++ /dev/null
@@ -1,80 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i bash -p coreutils curl git gnutar jq moreutils nix
-
-set -eu -o pipefail
-
-if [ ! -v 1 ]; then
-    echo "usage: lock-sdk-deps.sh <macOS version> <Packages>" >&2
-    echo " <macOS version>   Decimal-separated version number." >&2
-    echo "                   Must correspond to a tag in https://github.com/apple-oss-distributions/distribution-macOS" >&2
-    exit 1
-fi
-
-pkgdir=$(dirname "$(realpath "$0")")
-
-lockfile=$pkgdir/versions.json
-if [ -e "$lockfile" ]; then
-    echo '{}' > "$lockfile"
-fi
-
-workdir=$(mktemp -d)
-trap 'rm -rf -- "$workdir"' EXIT
-
-sdkVersion=$1; shift
-tag="macos-${sdkVersion//.}"
-
-declare -A ignoredPackages=(
-    [libsbuf]=1
-    [locale]=1
-    [mkAppleDerivation]=1
-    [update-source-releases.sh]=1
-    [versions.json]=1
-)
-
-readarray -t packages < <(
-    for file in "$pkgdir"/*; do
-        pkg=$(basename "$file" ".nix")
-        test ! "${ignoredPackages[$pkg]-}" && echo "$pkg"
-    done
-)
-
-echo "Locking versions for macOS $sdkVersion using tag '$tag'..."
-
-pushd "$workdir" > /dev/null
-
-git clone --branch "$tag" https://github.com/apple-oss-distributions/distribution-macOS.git &> /dev/null
-cd distribution-macOS
-
-for package in "${packages[@]}"; do
-    # If the tag exists in `release.json`, use that as an optimization to avoid downloading unnecessarily from Github.
-    packageTag=$(jq -r --arg package "$package" '.projects[] | select(.project == $package) | .tag' release.json)
-    packageCommit=$(git ls-tree -d HEAD "$package" | awk '{print $3}')
-
-    if [ ! -d "$package" ]; then
-        packageCommit=HEAD
-    fi
-
-    # However, sometimes it doesn’t exist. In that case, fall back to cloning the repo and check manually
-    # which tag corresponds to the commit from the submodule.
-    if [ -z "$packageTag" ]; then
-        git clone --no-checkout "https://github.com/apple-oss-distributions/$package.git" ../source &> /dev/null
-        pushd ../source > /dev/null
-        packageTag=$(git tag --points-at "$packageCommit")
-        popd > /dev/null
-        rm -rf ../source
-    fi
-
-    packageVersion=${packageTag##"$package"-}
-
-    curl -OL "https://github.com/apple-oss-distributions/$package/archive/$packageTag.tar.gz" &> /dev/null
-    tar axf "$packageTag.tar.gz"
-
-    packageHash=$(nix --extra-experimental-features nix-command hash path "$package-$packageTag")
-
-    pkgsjson="{\"$package\": {\"version\": \"$packageVersion\", \"hash\": \"$packageHash\"}}"
-
-    echo "   - Locking $package to version $packageVersion with hash '$packageHash'"
-    jq --argjson pkg "$pkgsjson" -S '. * $pkg' "$lockfile" | sponge "$lockfile"
-done
-
-popd > /dev/null
diff --git a/pkgs/os-specific/darwin/mk-apple-derivation/versions.json b/pkgs/os-specific/darwin/mk-apple-derivation/versions.json
deleted file mode 100644
index a80d604e2b83..000000000000
--- a/pkgs/os-specific/darwin/mk-apple-derivation/versions.json
+++ /dev/null
@@ -1,118 +0,0 @@
-{
-  "AvailabilityVersions": {
-    "hash": "sha256-eQ46qHk4AuHA+hRZq1IG2UtvZr/X2vtlOvi6hnG+FyA=",
-    "version": "151"
-  },
-  "Csu": {
-    "hash": "sha256-l8RI8aiin7ovZuoDh54thDmd/b502w+dtjN5ZoISZBg=",
-    "version": "88"
-  },
-  "ICU": {
-    "hash": "sha256-dIgrTjHcQm8dy2Ku5wNIHuPjHfoV+48TM0PNDDn6ZPk=",
-    "version": "76104.4"
-  },
-  "IOKitTools": {
-    "hash": "sha256-Oknsvzn4nv77WU7f0WPS446iwR2BM2q4iw46r/qctAE=",
-    "version": "125"
-  },
-  "PowerManagement": {
-    "hash": "sha256-ssg655SPT7gWnJWDaxambMKCopr+vLPYERW0IMKT0T8=",
-    "version": "1754.140.4"
-  },
-  "adv_cmds": {
-    "hash": "sha256-O+SB8sj3yqPv7GEBQQgvq+Y7kQRZI/i/UVa17J/OhZM=",
-    "version": "235"
-  },
-  "basic_cmds": {
-    "hash": "sha256-RQve2GqS9ke9hd8kupRMgoOKalTS229asi5tBGrBmS8=",
-    "version": "70"
-  },
-  "bootstrap_cmds": {
-    "hash": "sha256-6JG0sysgqLlgcpIOXfN+F0/gxpIIHZZ5et3gmDBoBGQ=",
-    "version": "138"
-  },
-  "copyfile": {
-    "hash": "sha256-hIHlY0prIFY0j8z0Hvlv2psrwLj41jYfKBM0KutLxew=",
-    "version": "224"
-  },
-  "developer_cmds": {
-    "hash": "sha256-jgQUjN9zmqi0/7XpqzbRsJjZIYeMrxXT1Zf3qi7+o+8=",
-    "version": "83"
-  },
-  "diskdev_cmds": {
-    "hash": "sha256-TD/sJkzIquTgq1zP/B7eBArxeTcp1Lqa8e8cJ1jnkHU=",
-    "version": "737.140.4"
-  },
-  "doc_cmds": {
-    "hash": "sha256-nnwKXKKjgJXcLCArD38Dme2L1WyR1U0rwn7zI+NCftw=",
-    "version": "69"
-  },
-  "dyld": {
-    "hash": "sha256-pbpSD5OeSMOcMJFAd7kyLINPROjqsafsCSphVGyIPyg=",
-    "version": "1286.10"
-  },
-  "file_cmds": {
-    "hash": "sha256-Rf/XA6uEaj7Wps2s8Oc/OhQVBjz8XiqJlj+cxjiQfQU=",
-    "version": "457.140.3"
-  },
-  "libffi": {
-    "hash": "sha256-xHefZVsZg9kUXV0t/HLdjPkkD/hn/4bvdRVJ4PsQLeM=",
-    "version": "40"
-  },
-  "libiconv": {
-    "hash": "sha256-50DC6LePtvdAh9FLa/esiwCUmYDxKofN6hCiv9+dmgQ=",
-    "version": "109.100.2"
-  },
-  "libpcap": {
-    "hash": "sha256-DqINoombdui5N6lNHcZ07c7LrVum4f8fFK89ymdCd0c=",
-    "version": "140"
-  },
-  "libresolv": {
-    "hash": "sha256-GtPVlL1mD58um5hOFd3HQKQ7pqutBe9jZKgQw8pOkPE=",
-    "version": "91"
-  },
-  "libutil": {
-    "hash": "sha256-tUsl22Z0HUVSkSoohFXkhicNFCW+RARvpTS0q6yaQFk=",
-    "version": "72"
-  },
-  "mail_cmds": {
-    "hash": "sha256-ET1nga9nwgBtN7fuvsPs1yqe5OhQ62PVl7LxqbsAPqU=",
-    "version": "38.0.1"
-  },
-  "misc_cmds": {
-    "hash": "sha256-04uBS16nNrg73Fqh4Obev7nQDjTTlY4f5+pEv3i0FIU=",
-    "version": "45"
-  },
-  "network_cmds": {
-    "hash": "sha256-sfZX6aA8mspfRKARIYFXX+bmlLHDoi485HQOvbRNP1Y=",
-    "version": "705.100.5"
-  },
-  "patch_cmds": {
-    "hash": "sha256-fDY2NOT3DnU5pm06cHSs+JJcA/EFP8Lxjg7sErUerJ0=",
-    "version": "72"
-  },
-  "remote_cmds": {
-    "hash": "sha256-8c/NgQZ+K6jJ3aoYK78/BsEkM1gmRS+9z0437+SvcCw=",
-    "version": "306"
-  },
-  "removefile": {
-    "hash": "sha256-Z5UD0mk/s80CQB0PZWDzSl2JWXmnVmwUvlNb28+hR3k=",
-    "version": "81"
-  },
-  "shell_cmds": {
-    "hash": "sha256-hoMssbZCrmzyJTgEAzOS4L7DhY9z/yXIcvHRhL6W5qc=",
-    "version": "326"
-  },
-  "system_cmds": {
-    "hash": "sha256-mEo+v0m+aP42XHHwibGKPkT55JFYLTOD5YT5IYQ8Hr0=",
-    "version": "1026.140.2"
-  },
-  "text_cmds": {
-    "hash": "sha256-5BBH/v1mJpExz65VDX6oh3dFCz49E+JMqJxkO96Y/xo=",
-    "version": "195"
-  },
-  "top": {
-    "hash": "sha256-e+k/jE49BMZZ24ge9JCa2ct5f1og6ewWb6U5ZMWdIEc=",
-    "version": "139.40.2"
-  }
-}