Artifact Formats
A format-level comparison of the artifacts this survey's tools produce. This page compares install contracts, not packager brands: a generator can emit several formats, but each resulting artifact still obeys its platform's identity, dependency, signing, and upgrade rules.
Last reviewed: July 12, 2026
At a glance
| Format | Structure / payload | Install model | Dependency model | Trust / update center | Primary deep-dive |
|---|---|---|---|---|---|
Archive (.zip, .tar.*) | generic file tree | extract and run/copy | bundle or document prerequisites | checksum/object signature; manual or separate updater | Windows portable, cargo-dist, GoReleaser |
Debian .deb | ar members: control + data tar archives | dpkg database; normally APT | Debian control relationships | repository metadata + package policy | Linux native packages, repositories |
| RPM | lead/signature/header/payload format | RPM database; DNF/Zypper/etc. | RPM capabilities/dependencies | package/repository signatures | Linux native packages, repositories |
| Arch package | compressed tar payload + .PKGINFO | pacman database | Arch dependency strings | repository database + package signatures | Linux native packages, repositories |
| AppImage | executable filesystem image + runtime | mount/extract and run | mostly bundled; base-system exclusions | direct-download signature/checksum; optional update info | AppImage, linuxdeploy/appimagetool |
| Flatpak | OSTree content + metadata; optional single-file bundle | per-user/system installation from remote | runtimes + declared permissions | signed remote/repository; managed updates | Flatpak |
| Snap | SquashFS image + snap metadata/assertions | snapd mount + confinement | base/content snaps + bundled payload | assertion chain / Snap Store; channels | Snap |
| MSI | relational installer database in structured storage | Windows Installer transaction | features/components/custom actions | Authenticode + MSI servicing identity | WiX/MSI |
| MSIX | ZIP-derived Open Packaging Convention package + manifest/block map | registered package deployment | framework packages / declared dependencies | mandatory package signature in normal deployment; managed updates | MSIX |
macOS .app | directory bundle (Contents/…) | run in place or copy | bundled frameworks/resources | nested code signatures + bundle identity | macOS bundles, signing |
| DMG | mountable disk image | drag/copy or carry other artifacts | whatever enclosed app/PKG uses | signed/notarized outer delivery as applicable | macOS containers, signing |
| PKG | XAR product/component installer archive | Installer writes receipts/system paths | installer distribution/components | Developer ID Installer signing + notarization | macOS containers, signing |
| XIP | signed XAR-like archive expanded by Archive Utility | authenticated expansion, not general app installation | payload-defined | Apple signing verification | macOS containers |
Portable archives
An archive preserves a staged file tree with almost no installation semantics. That is its strength: transparent contents, straightforward cross-host creation, and a clean fit for command-line applications whose contract is “put this executable on PATH.” It is also its limit: no OS package database, file ownership, repair, dependency solver, capability declaration, Start-menu registration, Gatekeeper bundle layout, or native rollback. Those must be handled by instructions, scripts, a package index, or an updater (Windows portable, cargo-dist, GoReleaser, Velopack).
Archive determinism depends on normalized entry order, timestamps, uid/gid, modes, symlink encoding, and compressor settings. A checksum belongs after archive creation and any signing/notarization that changes the distributed bytes (release pipeline).
Linux database-managed packages
Debian .deb
A binary .deb is an ar archive whose required members include debian-binary, a compressed control archive, and a compressed data archive. The control metadata names the package, architecture, version, dependencies, maintainer scripts, and conffile behavior. dpkg owns installation state; APT adds repository indexes, dependency resolution, and authenticated acquisition (Debian Policy, Linux native packages, repositories).
RPM
RPM stores package metadata in headers and the installed payload in a cpio-based archive (compression varies). Capability dependencies, scriptlets, file metadata, and package signatures are native concepts; DNF/Zypper-family clients add repository metadata and resolution. RPM's epoch/version/release ordering and distro policy are not interchangeable with Debian's even when the payload tree is identical (RPM format, Linux native packages, repositories).
Arch packages
An Arch package is a compressed tar archive with metadata files such as .PKGINFO; pacman owns installation and repository databases. Arch's rolling-release policy, dependency syntax, package naming, and pkgver/pkgrel semantics remain Arch-specific. “Can emit a .pkg.tar.zst” is therefore weaker than “meets Arch packaging policy” (PKGBUILD, Linux native packages, fpm/nfpm).
Across all three, native packages should normally be produced per distribution family and architecture, tested in representative roots, and published through a signed repository rather than treated as differently suffixed archives (Linux repositories, platform gotchas).
Linux self-contained and sandboxed artifacts
AppImage
An AppImage combines a small runtime with a filesystem image containing an AppDir-style application tree. The user marks it executable and runs it; the image is mounted or extracted rather than registered in a universal system package database. Portability is a deliberate dependency-selection exercise, not “copy every shared object”: core system libraries and kernel/filesystem/FUSE realities define the compatibility boundary (AppImage specification, AppImage, linuxdeploy/appimagetool).
Flatpak
Flatpak packages applications against named runtimes and distributes content through OSTree repositories. The manifest declares runtime/SDK, finish arguments (permissions), and build modules. Installation may be per-user or system-wide; remotes, refs, and OSTree content make deduplication, updates, and rollback repository-native. A .flatpak bundle is a transport form, not the whole Flatpak model (Flatpak docs, Flatpak).
Snap
A snap is a read-only SquashFS filesystem with metadata consumed by snapd; bases, interfaces, confinement levels, assertions, and store channels are part of the system. The installed artifact is mounted rather than expanded into normal filesystem ownership. Store/channel semantics and the daemon are therefore inseparable from the user experience (Snap format, Snap).
AppImage optimizes direct portable execution; Flatpak and Snap optimize managed, constrained installation and updates. They are not interchangeable Linux “bundle formats” (comparison).
Windows installer formats
MSI
MSI is a relational installation database interpreted by Windows Installer. Products contain features and components; components are the unit of installation and servicing, and GUID stability is a correctness constraint. Standard actions, conditions, rollback, repair, advertised entry points, and major/minor/small update rules form a deployment language. WiX compiles declarative source into that database; it does not change MSI's servicing model (Windows Installer, WiX/MSI).
Custom actions are an escape hatch with sequencing, privilege, rollback, and reliability costs. A portable ZIP or Inno/NSIS setup may be better when MSI enterprise deployment is not a requirement (Windows portable, Inno/NSIS).
MSIX
MSIX is ZIP/OPC-based and carries AppxManifest.xml, a block map, payload, and signature. It emphasizes declarative install behavior, package identity, clean deployment, and containerized/managed capabilities. Its identity/publisher and signing contracts are stricter than MSI's, and filesystem/registry virtualization can conflict with assumptions made by traditional desktop apps (MSIX packaging, MSIX). An .msixbundle groups architecture/resource packages under one distributable unit.
MSI and MSIX are separate product decisions: MSI maximizes compatibility with traditional Windows Installer administration; MSIX offers a more constrained modern deployment contract (comparison, platform gotchas).
macOS bundles and containers
.app
A .app is a directory bundle, not an archive: Contents/Info.plist, Contents/MacOS/<executable>, resources, frameworks, plug-ins, and helpers occupy defined locations. Finder presents it as one object, while the code-signing system seals nested code and resources. The executable's runtime library paths and the bundle's metadata must agree with the staged layout (Bundle Programming Guide, macOS bundles).
DMG
A DMG is a mountable disk image, commonly presenting a signed .app and an alias to /Applications. It is a delivery container, not an installer database: dragging the app copies the bundle. Filesystem format, window cosmetics, and mount behavior affect UX but not application identity (macOS containers).
PKG
A flat/distribution PKG is an installer archive that can place files in privileged locations, run installer scripts, and leave receipts. It is appropriate when copying one self-contained .app is insufficient; those same powers enlarge its security and rollback surface. Developer ID Installer identity differs from Developer ID Application identity used to sign app code (macOS containers, macOS signing).
XIP
XIP is a signed archive used prominently by Apple for trusted distribution of large bundles such as Xcode. It is not the normal third-party application format and should not be selected merely because it appears beside DMG/PKG in tooling (macOS containers).
Selection implications
| Need | First format to evaluate | Why / caveat |
|---|---|---|
| Lowest-friction CLI download | archive | transparent and portable; add checksums and install instructions (cargo-dist) |
| Linux distro-native dependency/admin integration | .deb + RPM, possibly Arch | repository and policy work are part of delivery (Linux repositories) |
| One-file Linux GUI/CLI download | AppImage | direct-run model; validate glibc/base-system compatibility (AppImage) |
| Sandboxed Linux desktop + managed updates | Flatpak or Snap | permissions/runtime/store are core, not optional wrappers (Flatpak, Snap) |
| Windows enterprise deployment/repair | MSI | component/GUID discipline required (WiX/MSI) |
| Modern identity-based Windows deployment | MSIX | signing and app-compat constraints required (MSIX) |
| macOS drag-install | signed/notarized .app in DMG | bundle remains the code object; DMG is transport (macOS signing) |
| macOS privileged/system install | PKG | use only where copy-install is insufficient (macOS containers) |
This table is a decision aid, not a Sparkles commitment; the staged recommendation is in recommendations.
Sources
- Debian Policy: binary packages
- RPM package format
- Arch
PKGBUILD(5) - AppImage specification
- Flatpak documentation
- Snap format documentation
- Windows Installer documentation
- MSIX packaging documentation
- Apple Bundle Programming Guide
- Per-format deep-dives carry pinned implementation repositories and additional primary specifications.