diff --git a/crypto/build.gradle b/crypto/build.gradle
index 73d2a5a..8f05595 100644
--- a/crypto/build.gradle
+++ b/crypto/build.gradle
@@ -14,7 +14,7 @@ task compileRust {
     project.logger.info("#####################" + System.getProperty("os.name").toLowerCase())
     doLast {
         // nix build detection
-        if (!System.getenv('NIX_CC').empty) {
+        if (System.getenv('NIX_CC') != null) {
             exec {
                 workingDir 'src/jni-crypto'
                 commandLine 'cargo', 'build', '--release', '--target=aarch64-unknown-linux-gnu', '--target-dir=../../build/jni-crypto'
@@ -29,11 +29,25 @@ task compileRust {
                 environment RUSTFLAGS: "-L ${System.getenv('PTHREAD_LOCATION')}"
             }
         } else {
+            // keep the old build behavior while not running in nix shell
+            if (System.getProperty("os.name").toLowerCase().contains("linux")) {
+                exec {
+                    workingDir 'src/jni-crypto'
+                    commandLine 'cargo', 'build', '--release', '--target=x86_64-unknown-linux-gnu', '--target-dir=../../build/jni-crypto'
+                }
+            } else if (System.getProperty("os.name").toLowerCase().contains("windows")) {
+                exec {
+                    workingDir 'src/jni-crypto'
+                    commandLine 'cargo', 'build', '--release', '--target=x86_64-pc-windows-gnu', '--target-dir=../../build/jni-crypto'
+                }
+            }
             // Does not cover solaris, just MacOS. See potential return types here:
-            // https://docs.gradle.org/current/javadoc/org/gradle/nativeplatform/platform/OperatingSystem.html  
-            exec {
-                workingDir 'src/jni-crypto'
-                commandLine 'cargo', 'build', '--release', '--target-dir=../../build/jni-crypto'
+            // https://docs.gradle.org/current/javadoc/org/gradle/nativeplatform/platform/OperatingSystem.html
+            else {
+                exec {
+                    workingDir 'src/jni-crypto'
+                    commandLine 'cargo', 'build', '--release', '--target-dir=../../build/jni-crypto'
+                }
             }
         }
     }
diff --git a/crypto/src/main/java/com/strategyobject/substrateclient/crypto/sr25519/Native.java b/crypto/src/main/java/com/strategyobject/substrateclient/crypto/sr25519/Native.java
index ab9be02..fae76da 100644
--- a/crypto/src/main/java/com/strategyobject/substrateclient/crypto/sr25519/Native.java
+++ b/crypto/src/main/java/com/strategyobject/substrateclient/crypto/sr25519/Native.java
@@ -56,7 +56,7 @@ private static String copyLibraryFromResourcesToTempDir() throws IOException {
             osDir = "x86_64-linux";
         } else if (IS_LINUX && IS_AARCH64)  {
             osDir = "aarch64-linux";
-        } else if (IS_MAC) { // TODO 'MasOS support problem'
+        } else if (IS_MAC) { // TODO 'MacOS support problem'
             osDir = "macos";
         } else {
             throw new RuntimeException("JNI library can't be loaded because OS wasn't detected as supported.");