hopefully fix windows build?

.drone.yml

@@ -10,24 +10,15 @@ steps:
 - name : build windows
   image: golang:latest
   commands:
-  - go build -o windows_test ./cmd/test_prog
-  enviroment: 
-    GOOS: windows
-    GOARCH: amd64
+  - GOOS=windows GOARCH=amd64 go build -o windows_test.exe ./cmd/test_prog
 - name : build linux
   image: golang:latest
   commands:
-  - go build -o linux_test ./cmd/test_prog
-  enviroment: 
-    GOOS: linux
-    GOARCH: amd64   
+  - GOOS=linux GOARCH=amd64 go build -o linux_test ./cmd/test_prog 
 - name : build mac
   image: golang:latest
   commands:
-  - go build -o mac_test ./cmd/test_prog
-  enviroment: 
-    GOOS: darwin
-    GOARCH: amd64       
+  - GOOS=darwin GOARCH=amd64 go build -o mac_test ./cmd/test_prog
       
 
 - name: publish
@@ -48,6 +39,6 @@ steps:
     files:
       - mac_test
       - linux_test
-      - windows_test
+      - windows_test.exe
     checksum:
       - sha1