diff --git a/project.clj b/project.clj
index 8dcbde50..a3ac4c96 100644
--- a/project.clj
+++ b/project.clj
@@ -20,7 +20,10 @@
                  [cheshire "5.10.0"]
                  [nrepl/bencode "1.1.0"]
                  [borkdude/sci.impl.reflector "0.0.1"]
-                 [org.clojure/test.check "1.1.0"]]
+                 [org.clojure/test.check "1.1.0"]
+                 ;; core async was moved from the core async feature to here,
+                 ;; because it is used in tasks
+                 [org.clojure/core.async "1.3.610"]]
   :profiles {:feature/xml  {:source-paths ["feature-xml"]
                             :dependencies [[org.clojure/data.xml "0.2.0-alpha6"]]}
              :feature/yaml {:source-paths ["feature-yaml"]
@@ -31,8 +34,7 @@
              ;:feature/oracledb [:feature/jdbc {:dependencies [[com.oracle.database.jdbc/ojdbc8 "19.8.0.0"]]}]
              :feature/oracledb [:feature/jdbc {:dependencies [[io.helidon.integrations.db/ojdbc "2.1.0"]]}] ; ojdbc10 + GraalVM config, by Oracle
              :feature/hsqldb [:feature/jdbc {:dependencies [[org.hsqldb/hsqldb "2.5.1"]]}]
-             :feature/core-async {:source-paths ["feature-core-async"]
-                                  :dependencies [[org.clojure/core.async "1.3.610"]]}
+             :feature/core-async {:source-paths ["feature-core-async"]}
              :feature/csv {:source-paths ["feature-csv"]
                            :dependencies [[org.clojure/data.csv "1.0.0"]]}
              :feature/transit {:source-paths ["feature-transit"]
diff --git a/src-java/babashka/impl/Graal.java b/src-java/babashka/impl/Graal.java
index 97541853..2e5e296b 100644
--- a/src-java/babashka/impl/Graal.java
+++ b/src-java/babashka/impl/Graal.java
@@ -25,22 +25,36 @@ public class Graal {
     @CFunction
     private static native int setenv(CCharPointer name, CCharPointer value, int overwrite);
 
-    // API
-    public static int setEnv(String name, String value) {
-        int ret = 0;
-        System.out.println("setenv" + " " + name + " " + value);
-        try (CCharPointerHolder nameHolder = CTypeConversion.toCString(name);
-             CCharPointerHolder valueHolder = CTypeConversion.toCString(value)) {
-            ret = setenv(nameHolder.get(), valueHolder.get(), 1);
-            System.out.println(System.getenv(name));
-        }
-        System.out.println(System.getenv(name));
-        return ret;
+    @CFunction
+    private static native CCharPointer getenv(CCharPointer name);
+
+    // Public API
+
+    public static boolean setEnv(String name, String value) {
+        return setEnv(name, value, true);
     }
 
-    // public static void main(String[] args) {
-    //     setEnv(args[0], args[1]);
-    //     System.out.println(System.getenv(args[0]));
-    // }
-}
+    public static boolean setEnv(String name, String value, boolean overwrite) {
+        boolean ret = false;
+        try (CCharPointerHolder nameHolder = CTypeConversion.toCString(name)) {
+            CCharPointerHolder valueHolder = CTypeConversion.toCString(value);
+            int w = (overwrite ? 1 : 0);
+            int cRet = setenv(nameHolder.get(), valueHolder.get(), w);
+            ret = (cRet == 0 ? true : false);
+            return ret;
+        }
+    }
 
+    public static String getEnv(String name) {
+        try (CCharPointerHolder nameHolder = CTypeConversion.toCString(name);) {
+            CCharPointer p = getenv(nameHolder.get());
+            String ret = CTypeConversion.toJavaString(p);
+            return ret;
+        }
+    }
+
+    public static void main(String[] args) {
+        System.out.println(setEnv(args[0], args[1]));
+        System.out.println(getEnv(args[0]));
+    }
+}
diff --git a/src/babashka/impl/utils.clj b/src/babashka/impl/utils.clj
deleted file mode 100644
index d9b8b046..00000000
--- a/src/babashka/impl/utils.clj
+++ /dev/null
@@ -1,13 +0,0 @@
-(ns babashka.impl.utils
-  {:no-doc true}
-  (:require [babashka.utils :as utils]
-            [sci.core :as sci]))
-
-(def uns (sci/create-ns 'babashka.utils nil))
-
-(def utils-namespace
-  {'set-env (sci/copy-var utils/set-env uns)})
-
-
-
-
diff --git a/src/babashka/main.clj b/src/babashka/main.clj
index f13a0780..8ec4f1df 100644
--- a/src/babashka/main.clj
+++ b/src/babashka/main.clj
@@ -23,6 +23,7 @@
    [babashka.impl.error-handler :refer [error-handler]]
    [babashka.impl.features :as features]
    [babashka.impl.fs :refer [fs-namespace]]
+   [babashka.impl.os :refer [os-namespace]]
    [babashka.impl.pods :as pods]
    [babashka.impl.pprint :refer [pprint-namespace]]
    [babashka.impl.process :refer [process-namespace]]
@@ -34,7 +35,6 @@
    [babashka.impl.tasks :as tasks :refer [tasks-namespace]]
    [babashka.impl.test :as t]
    [babashka.impl.tools.cli :refer [tools-cli-namespace]]
-   [babashka.impl.utils :refer [utils-namespace]]
    [babashka.nrepl.server :as nrepl-server]
    [babashka.wait :as wait]
    [clojure.edn :as edn]
@@ -315,7 +315,7 @@ Use bb run --help to show this help output.
        'clojure.java.shell shell-namespace
        'babashka.wait {'wait-for-port wait/wait-for-port
                        'wait-for-path wait/wait-for-path}
-       'babashka.utils utils-namespace
+       'babashka.os os-namespace
        'babashka.signal {'pipe-signal-received? pipe-signal-received?}
        'clojure.java.io io-namespace
        'cheshire.core cheshire-core-namespace
diff --git a/src/babashka/utils.clj b/src/babashka/utils.clj
deleted file mode 100644
index 6c315cce..00000000
--- a/src/babashka/utils.clj
+++ /dev/null
@@ -1,13 +0,0 @@
-(ns babashka.utils)
-
-(defmacro if-graal [then else]
-  (if (resolve 'babashka.impl.Graal)
-    then
-    else))
-
-(defn set-env [name value]
-  (if-graal
-      (do
-        (prn :setting name value)
-        (prn (babashka.impl.Graal/setEnv name value)))
-    (throw (UnsupportedOperationException. "set-env is only available in the native image."))))