diff --git a/src/alire/alire-index.ads b/src/alire/alire-index.ads
index 2e581d033..485dc5501 100644
--- a/src/alire/alire-index.ads
+++ b/src/alire/alire-index.ads
@@ -49,21 +49,14 @@ package Alire.Index is
    --  The branch used for the community index. Must be updated when new index
    --  features are introduced.
 
-   Min_Compatible_Version : constant String := "1.1";
-   --  Update as needed in case of backward-incompatible changes
-
-   Max_Compatible_Version : constant String :=
-                              AAA.Strings.Tail (Community_Branch, '-');
+   Min_Compatible_Version : constant Semantic_Versioning.Version;
+   --  Based on the constant defined in private section
 
    --  We store here the indexes we are able to load. As long as we do not
    --  break back compatibility, we can keep on simply updating the minor value
-   Valid_Versions : constant Semantic_Versioning.Extended.Version_Set :=
-                        Semantic_Versioning.Extended.Value
-                          ("^" & Min_Compatible_Version
-                           & " & <=" & Max_Compatible_Version);
+   Valid_Versions : constant Semantic_Versioning.Extended.Version_Set;
 
-   Version : constant Semantic_Versioning.Version :=
-                      Semantic_Versioning.New_Version (Max_Compatible_Version);
+   Version : constant Semantic_Versioning.Version;
    --  The index version understood by alire must match the one in the indexes
    --  being loaded.
 
@@ -173,4 +166,28 @@ package Alire.Index is
    --  applied during load:
    --  * Whether some origin is not in our allowed hosting sites.
 
+private
+
+   --  The string constants for versions are kept in the private section to
+   --  avoid using them in command output or other message. The only option
+   --  is to use the Sementic_Versioning.Image function which will provide a
+   --  consistant output.
+
+   Min_Compatible_Version_Str : constant String := "1.1";
+   --  Update as needed in case of backward-incompatible changes
+
+   Max_Compatible_Version_Str : constant String :=
+                              AAA.Strings.Tail (Community_Branch, '-');
+
+   Min_Compatible_Version : constant Semantic_Versioning.Version :=
+     Semantic_Versioning.New_Version (Min_Compatible_Version_Str);
+
+   Valid_Versions : constant Semantic_Versioning.Extended.Version_Set :=
+                        Semantic_Versioning.Extended.Value
+                          ("^" & Min_Compatible_Version_Str
+                           & " & <=" & Max_Compatible_Version_Str);
+
+   Version : constant Semantic_Versioning.Version :=
+     Semantic_Versioning.New_Version (Max_Compatible_Version_Str);
+
 end Alire.Index;
diff --git a/src/alire/alire-toml_index.adb b/src/alire/alire-toml_index.adb
index 07c3aac60..b60e714b0 100644
--- a/src/alire/alire-toml_index.adb
+++ b/src/alire/alire-toml_index.adb
@@ -203,14 +203,13 @@ package body Alire.TOML_Index is
                           & ") is newer than that expected by alr ("
                           & Alire.Index.Version.Image & ")."
                           & " You may have to update alr");
-            elsif Loading_Index_Version < Semver.Parse
-                                           (Alire.Index.Min_Compatible_Version)
+            elsif Loading_Index_Version < Alire.Index.Min_Compatible_Version
             then
                Set_Error
                  (Result, Filename,
                   "index version (" & Loading_Index_Version.Image
                   & ") is too old. The minimum compatible version is "
-                  & Alire.Index.Min_Compatible_Version & ASCII.LF
+                  & Alire.Index.Min_Compatible_Version.Image & ASCII.LF
                   & (if Index.Name = Alire.Index.Community_Name then
                        " Resetting the community index ("
                        & TTY.Terminal ("alr index --reset-community")