diff --git a/emulators/eightyone.yml b/emulators/eightyone.yml
index 00c1705bb..a6f17662d 100644
--- a/emulators/eightyone.yml
+++ b/emulators/eightyone.yml
@@ -6,8 +6,10 @@ upstream: "https://github.com/charlierobson/EightyOne"
 profiled_date: "2026-10-17"
 source_commit: "39ea0cc26453f4026458cfff62f10223a6bb1724"
 core_version: "v1.2"
+pin_frozen: "Recalbox, the only platform that ships this core, builds its tag v1.2 (Recalbox package/libretro-eightyone/libretro-eightyone.mk:8 at tag 10.1.1)."
 display_name: "Sinclair - ZX81 / ZX Spectrum (EightyOne, Recalbox)"
 cores: ["eightyone"]
+built_by: [recalbox]
 systems:
   - sinclair-zx81
   - sinclair-zx80
diff --git a/emulators/exel-hence.yml b/emulators/exel-hence.yml
index 36a479ea0..c743a39e2 100644
--- a/emulators/exel-hence.yml
+++ b/emulators/exel-hence.yml
@@ -6,9 +6,11 @@ upstream: "https://gitlab.com/recalbox/packages/recalbox-cores/libretro-exel-hen
 profiled_date: "2026-10-17"
 source_commit: "213328332cbfd8121e018493443e223a7a780961"
 core_version: "v0.9"
+pin_frozen: "Recalbox, the only platform that ships this core, builds its tag v0.9 (Recalbox package/libretro-exel-hence/libretro-exel-hence.mk:9 at tag 10.1.1)."
 display_name: "Exelvision - EXL 100 (Exel-Hence)"
 cores:
   - "exel-hence"
+built_by: [recalbox]
 systems:
   - "exelvision-exl100"
 
diff --git a/emulators/sugarbox2.yml b/emulators/sugarbox2.yml
index 5d5b25433..251e00553 100644
--- a/emulators/sugarbox2.yml
+++ b/emulators/sugarbox2.yml
@@ -9,6 +9,7 @@ core_version: "v0.9"
 display_name: "Amstrad - CPC / GX4000 (Sugarbox2)"
 cores:
   - "sugarbox2"
+built_by: [recalbox]
 systems:
   - "amstrad-cpc"