Validate real FreeBSD package builds

docs/PROGRESS.md

@@ -1723,3 +1723,34 @@ Next recommended step:
   - Fruix at the product boundary
   - `/frx` as the canonical store root
   - stable upstream-derived internal names unless there is strong architectural value in renaming them
+
+## 2026-04-01 — Phase 6.1 completed: real package build validated into `/frx/store`
+
+Completed work:
+
+- added a runnable real-package harness:
+  - `tests/guix/run-phase6-real-package-build.sh`
+- wrote the Phase 6.1 report:
+  - `docs/reports/phase6-real-package-build-freebsd.md`
+- ran the real-package harness successfully and captured metadata under:
+  - `/tmp/phase6-real-package-metadata.txt`
+
+Important findings:
+
+- the checkout can now build a real package definition derived from Guix's `hello` package through:
+  - `./pre-inst-env fruix build -f ...`
+  - the FreeBSD-aware daemon
+  - `/frx/store`
+- this moves the project beyond the deliberately minimal Phase 5 custom derivation path and into a real package-definition flow
+- the current successful path still uses a prefetched local GNU Hello tarball as the package source because the built-in downloader path remains a separate unresolved FreeBSD/root-daemon issue
+- observed metadata confirmed:
+  - `drv_path=/frx/store/...-hello-2.12.3.drv`
+  - `out_path=/frx/store/...-hello-2.12.3`
+  - `source_store_path=/frx/store/...-hello-2.12.3.tar.gz`
+  - `runtime_output=Hello, world!`
+- a daemon-side references query confirmed that the built output preserved the declared source store item as a direct reference
+
+Current assessment:
+
+- Phase 6.1 is now satisfied on the current FreeBSD prototype track
+- the next step is to move the already validated jail/build-user model into this live package-build path rather than keeping it prototype-only