diff --git a/scripts/build_env.py b/scripts/build_env.py
index c4b475e..571ec7f 100644
--- a/scripts/build_env.py
+++ b/scripts/build_env.py
@@ -1,25 +1,48 @@
 import os
+import subprocess
 
-def buildEnvExists():
+def ghdlEnvExists(relativePath="work"):
+    ## Check if work exists
     try:
-        result = os.lstat("work")
-    except FileNotFoundError:
-        result = "-1"
-    except e:
-        result = "-2"
-    if result == "-2":
-        print(f"Encountered an unexpected error {e}")
-        print("exiting...")
-        return
-    if result == "-1":
-        print("Work doesn't exist, initializing build environment")
-        return
-    print("Work exists, no filesystem things to do")
-    if os.access("work", os.W_OK):
-        print("write access checked inside work, nothing to do")
-    else:
-        print("work is not writable, change permissions of dir")
+        os.lstat(relativePath)
+    except:
+        return False
+    ## Check that work is writable
+    if not os.access(relativePath, os.W_OK):
+        print(f"{relativePath} is write-protected, please acquire correct permissions")
+        return False
+    cfFileExists = False
+    filesInWork = os.listdir(relativePath)
+    for file in filesInWork:
+        if ".cf" in file:
+            cfFileExists = True
+    if not cfFileExists:
+        return False
+    ## Nothing bad, continue
+    return True
+
+def createBuildEnv():
+    if ghdlEnvExists():
+       return -1
+    ## Create build env
+    os.makedirs("work",exist_ok=True)
+    addAllVHDLFiles(init=False)
+    return 0
+
+def addAllVHDLFiles(init=False):
+    ## Ensure everything is ready for adding files 
+    ## (init exception to avoid one if-case in ghdlEnvExists)
+    if not ghdlEnvExists() and not init:
+       return -1
+    ## Add files
+    vhdlFiles = []
+    for file in os.listdir():
+        if ".vhd" in file:
+            vhdlFiles.append(file)
+    command = ["ghdl", "-i", "--workdir=work"] + vhdlFiles
+    subprocess.run(command)
+    return 0
 
 
 if __name__ == "__main__":
-    buildEnvExists()
+    createBuildEnv()