diff --git a/nix/ext/hypopg.nix b/nix/ext/hypopg.nix
index d95a1c7f71..9bd4927263 100644
--- a/nix/ext/hypopg.nix
+++ b/nix/ext/hypopg.nix
@@ -98,6 +98,7 @@ buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/index_advisor.nix b/nix/ext/index_advisor.nix
index 3130d4bcc2..5892127142 100644
--- a/nix/ext/index_advisor.nix
+++ b/nix/ext/index_advisor.nix
@@ -83,6 +83,7 @@ pkgs.buildEnv {
   ];
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pg-safeupdate.nix b/nix/ext/pg-safeupdate.nix
index 168772ce23..452e9c2c5e 100644
--- a/nix/ext/pg-safeupdate.nix
+++ b/nix/ext/pg-safeupdate.nix
@@ -83,6 +83,7 @@ pkgs.buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pg_cron/default.nix b/nix/ext/pg_cron/default.nix
index a823fa450b..4450f8e6bb 100644
--- a/nix/ext/pg_cron/default.nix
+++ b/nix/ext/pg_cron/default.nix
@@ -116,6 +116,7 @@ buildEnv {
   };
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit switch-ext-version latestOnly;
diff --git a/nix/ext/pg_net.nix b/nix/ext/pg_net.nix
index 87b994a5ef..f769bad314 100644
--- a/nix/ext/pg_net.nix
+++ b/nix/ext/pg_net.nix
@@ -145,6 +145,7 @@ pkgs.buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pg_partman.nix b/nix/ext/pg_partman.nix
index 4c36e765fc..0c8a4eee6e 100644
--- a/nix/ext/pg_partman.nix
+++ b/nix/ext/pg_partman.nix
@@ -100,6 +100,7 @@ pkgs.buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit switch-ext-version libName latestOnly;
diff --git a/nix/ext/pg_repack.nix b/nix/ext/pg_repack.nix
index 1a7500ea27..78d9764063 100644
--- a/nix/ext/pg_repack.nix
+++ b/nix/ext/pg_repack.nix
@@ -140,6 +140,7 @@ buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pg_tle.nix b/nix/ext/pg_tle.nix
index 45ba670385..9c7ef86755 100644
--- a/nix/ext/pg_tle.nix
+++ b/nix/ext/pg_tle.nix
@@ -111,6 +111,7 @@ buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pgaudit.nix b/nix/ext/pgaudit.nix
index 74429fa415..8fb727c666 100644
--- a/nix/ext/pgaudit.nix
+++ b/nix/ext/pgaudit.nix
@@ -240,6 +240,7 @@ buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pgmq/default.nix b/nix/ext/pgmq/default.nix
index 42613b6acd..59449c8edb 100644
--- a/nix/ext/pgmq/default.nix
+++ b/nix/ext/pgmq/default.nix
@@ -104,6 +104,7 @@ buildEnv {
   pathsToLink = [ "/share/postgresql/extension" ];
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pgroonga/default.nix b/nix/ext/pgroonga/default.nix
index 42345bd49a..b9c3829a0d 100644
--- a/nix/ext/pgroonga/default.nix
+++ b/nix/ext/pgroonga/default.nix
@@ -181,6 +181,7 @@ buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pgrouting/default.nix b/nix/ext/pgrouting/default.nix
index 87d190cdc7..cc00281e70 100644
--- a/nix/ext/pgrouting/default.nix
+++ b/nix/ext/pgrouting/default.nix
@@ -153,6 +153,7 @@ buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pgsodium.nix b/nix/ext/pgsodium.nix
index 5a615a8722..b5a2dcb72c 100644
--- a/nix/ext/pgsodium.nix
+++ b/nix/ext/pgsodium.nix
@@ -112,6 +112,7 @@ pkgs.buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pgsql-http.nix b/nix/ext/pgsql-http.nix
index 5815f91607..885fcc472e 100644
--- a/nix/ext/pgsql-http.nix
+++ b/nix/ext/pgsql-http.nix
@@ -113,6 +113,7 @@ pkgs.buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/pgvector.nix b/nix/ext/pgvector.nix
index 5f613b3d52..2db9d0c123 100644
--- a/nix/ext/pgvector.nix
+++ b/nix/ext/pgvector.nix
@@ -96,6 +96,7 @@ pkgs.buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/plv8/default.nix b/nix/ext/plv8/default.nix
index 93a17434a1..731991937c 100644
--- a/nix/ext/plv8/default.nix
+++ b/nix/ext/plv8/default.nix
@@ -238,6 +238,7 @@ buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/postgis.nix b/nix/ext/postgis.nix
index 99afea6f5b..3f722d9ad9 100644
--- a/nix/ext/postgis.nix
+++ b/nix/ext/postgis.nix
@@ -256,6 +256,7 @@ in
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;
diff --git a/nix/ext/vault.nix b/nix/ext/vault.nix
index 18ffe0aa77..9ab5391b1d 100644
--- a/nix/ext/vault.nix
+++ b/nix/ext/vault.nix
@@ -99,6 +99,7 @@ pkgs.buildEnv {
   '';
 
   passthru = {
+    perVersion = lib.mapAttrs (name: value: build name value.hash) versionsToUse;
     versions = versionsBuilt;
     numberOfVersions = numberOfVersionsBuilt;
     inherit pname latestOnly;