diff --git a/src/babashka/pods/impl/resolver.clj b/src/babashka/pods/impl/resolver.clj
index 690ef48..ff139c9 100644
--- a/src/babashka/pods/impl/resolver.clj
+++ b/src/babashka/pods/impl/resolver.clj
@@ -15,36 +15,38 @@
     "x86_64"
     arch))
 
-(def os {:os/name (or (System/getenv "OS_NAME") (System/getProperty "os.name"))
-         :os/arch (let [arch (or (System/getenv "OS_ARCH")
-                                 (System/getProperty "os.arch"))]
-                    (normalize-arch arch))})
+(def os
+  (delay
+    {:os/name (or (System/getenv "OS_NAME") (System/getProperty "os.name"))
+     :os/arch (let [arch (or (System/getenv "OS_ARCH")
+                             (System/getProperty "os.arch"))]
+                (normalize-arch arch))}))
 
 (defn warn [& strs]
   (binding [*out* *err*]
     (apply println strs)))
 
 (defn match-artifacts
-  ([package] (match-artifacts package (:os/arch os)))
+  ([package] (match-artifacts package (:os/arch @os)))
   ([package arch]
    (let [artifacts (:pod/artifacts package)
          res (filter (fn [{os-name :os/name
                            os-arch :os/arch}]
                        (let [os-arch (normalize-arch os-arch)]
-                         (and (re-matches (re-pattern os-name) (:os/name os))
+                         (and (re-matches (re-pattern os-name) (:os/name @os))
                               (re-matches (re-pattern os-arch)
                                           arch))))
                      artifacts)]
      (if (empty? res)
-       (if (and (= "Mac OS X" (:os/name os))
-                (= "aarch64" (:os/arch os)))
+       (if (and (= "Mac OS X" (:os/name @os))
+                (= "aarch64" (:os/arch @os)))
          ;; Rosetta2 fallback on Apple M1 machines
          (match-artifacts package "x86_64")
          (throw (IllegalArgumentException. (format "No executable found for pod %s (%s) and OS %s/%s"
                                                    (:pod/name package)
                                                    (:pod/version package)
-                                                   (:os/name os)
-                                                   (:os/arch os)))))
+                                                   (:os/name @os)
+                                                   (:os/arch @os)))))
        res))))
 
 (defn unzip [{:keys [^java.io.File zip-file