diff --git a/completions/_mise b/completions/_mise
index 3d0ef61575..af5bf03024 100644
--- a/completions/_mise
+++ b/completions/_mise
@@ -27,11 +27,11 @@ _mise() {
     zstyle ":completion:${curcontext}:" cache-policy _usage_mise_cache_policy
   fi
 
-  if ( [[ -z "${_usage_spec_mise_2025_7_5:-}" ]] || _cache_invalid _usage_spec_mise_2025_7_5 ) \
-      && ! _retrieve_cache _usage_spec_mise_2025_7_5;
+  if ( [[ -z "${_usage_spec_mise_2025_7_7:-}" ]] || _cache_invalid _usage_spec_mise_2025_7_7 ) \
+      && ! _retrieve_cache _usage_spec_mise_2025_7_7;
   then
     spec="$(mise usage)"
-    _store_cache _usage_spec_mise_2025_7_5 spec
+    _store_cache _usage_spec_mise_2025_7_7 spec
   fi
 
   _arguments "*: :(($(usage complete-word --shell zsh -s "$spec" -- "${words[@]}" )))"
diff --git a/completions/mise.bash b/completions/mise.bash
index 6b948ee7e5..e39efb2516 100644
--- a/completions/mise.bash
+++ b/completions/mise.bash
@@ -6,14 +6,14 @@ _mise() {
         return 1
     fi
 
-    if [[ -z ${_usage_spec_mise_2025_7_5:-} ]]; then
-        _usage_spec_mise_2025_7_5="$(mise usage)"
+    if [[ -z ${_usage_spec_mise_2025_7_7:-} ]]; then
+        _usage_spec_mise_2025_7_7="$(mise usage)"
     fi
 
 	local cur prev words cword was_split comp_args
     _comp_initialize -n : -- "$@" || return
     # shellcheck disable=SC2207
-	_comp_compgen -- -W "$(usage complete-word --shell bash -s "${_usage_spec_mise_2025_7_5}" --cword="$cword" -- "${words[@]}")"
+	_comp_compgen -- -W "$(usage complete-word --shell bash -s "${_usage_spec_mise_2025_7_7}" --cword="$cword" -- "${words[@]}")"
 	_comp_ltrim_colon_completions "$cur"
     # shellcheck disable=SC2181
     if [[ $? -ne 0 ]]; then
diff --git a/completions/mise.fish b/completions/mise.fish
index 95b145cd11..584d07bc15 100644
--- a/completions/mise.fish
+++ b/completions/mise.fish
@@ -6,12 +6,12 @@ if ! command -v usage &> /dev/null
     return 1
 end
 
-if ! set -q _usage_spec_mise_2025_7_5
-  set -g _usage_spec_mise_2025_7_5 (mise usage | string collect)
+if ! set -q _usage_spec_mise_2025_7_7
+  set -g _usage_spec_mise_2025_7_7 (mise usage | string collect)
 end
 set -l tokens
 if commandline -x >/dev/null 2>&1
-    complete -xc mise -a '(usage complete-word --shell fish -s "$_usage_spec_mise_2025_7_5" -- (commandline -xpc) (commandline -t))'
+    complete -xc mise -a '(usage complete-word --shell fish -s "$_usage_spec_mise_2025_7_7" -- (commandline -xpc) (commandline -t))'
 else
-    complete -xc mise -a '(usage complete-word --shell fish -s "$_usage_spec_mise_2025_7_5" -- (commandline -opc) (commandline -t))'
+    complete -xc mise -a '(usage complete-word --shell fish -s "$_usage_spec_mise_2025_7_7" -- (commandline -opc) (commandline -t))'
 end
diff --git a/src/backend/platform.rs b/src/backend/platform.rs
index 04d0b11d22..a56a130b88 100644
--- a/src/backend/platform.rs
+++ b/src/backend/platform.rs
@@ -32,14 +32,16 @@ pub fn platform_aliases() -> Vec<(String, String)> {
 
 /// Looks up a value in a BTreeMap using all possible platform key aliases.
 /// Example: for key_type = "url", will check platform_macos_x64_url, platform_darwin_amd64_url, etc.
+/// Also supports both "platforms_" and "platform_" prefixes.
 pub fn lookup_platform_key<'a>(
     opts: &'a BTreeMap<String, String>,
     key_type: &str,
 ) -> Option<&'a String> {
     for (os, arch) in platform_aliases() {
-        let key = format!("platform_{os}_{arch}_{key_type}");
-        if let Some(val) = opts.get(&key) {
-            return Some(val);
+        for prefix in ["platforms", "platform"] {
+            if let Some(val) = opts.get(&format!("{prefix}_{os}_{arch}_{key_type}")) {
+                return Some(val);
+            }
         }
     }
     None