diff --git a/src/nimblepkg/nimscriptapi.nim b/src/nimblepkg/nimscriptapi.nim
old mode 100755
new mode 100644
index eba18cd..0ace797
--- a/src/nimblepkg/nimscriptapi.nim
+++ b/src/nimblepkg/nimscriptapi.nim
@@ -35,6 +35,7 @@ var
   success = false
   retVal = true
   projectFile = ""
+  outFile = ""
 
 proc requires*(deps: varargs[string]) =
   ## Call this to set the list of requirements of your Nimble
@@ -42,13 +43,18 @@ proc requires*(deps: varargs[string]) =
   for d in deps: requiresData.add(d)
 
 proc getParams() =
+  # Called by nimscriptwrapper.nim:execNimscript()
+  #   nim e --flags /full/path/to/file.nims /full/path/to/file.out action
   for i in 2 .. paramCount():
     let
       param = paramStr(i)
-    if param.fileExists():
-      projectFile = param
-    elif param[0] != '-':
-      commandLineParams.add paramStr(i).normalize
+    if param[0] != '-':
+      if projectFile.len == 0:
+        projectFile = param
+      elif outFile.len == 0:
+        outFile = param
+      else:
+        commandLineParams.add param.normalize
 
 proc getCommand*(): string =
   return command
@@ -136,7 +142,8 @@ proc onExit*() =
 
     output &= "\"retVal\": " & $retVal
 
-    writeFile(projectFile & ".out", "{" & output & "}")
+    if outFile.len != 0:
+      writeFile(outFile, "{" & output & "}")
 
 # TODO: New release of Nim will move this `task` template under a
 # `when not defined(nimble)`. This will allow us to override it in the future.
diff --git a/src/nimblepkg/nimscriptwrapper.nim b/src/nimblepkg/nimscriptwrapper.nim
old mode 100755
new mode 100644
index 0956b79..ff28e8e
--- a/src/nimblepkg/nimscriptwrapper.nim
+++ b/src/nimblepkg/nimscriptwrapper.nim
@@ -4,7 +4,7 @@
 ## Implements the new configuration system for Nimble. Uses Nim as a
 ## scripting language.
 
-import common, version, options, packageinfo, cli
+import common, version, options, packageinfo, cli, tools
 import hashes, json, os, streams, strutils, strtabs,
   tables, times, osproc, sets, pegs
 
@@ -26,6 +26,7 @@ proc execNimscript(nimsFile, projectDir, actionName: string, options: Options,
   let
     shash = $projectDir.hash().abs()
     nimsFileCopied = projectDir / nimsFile.splitFile().name & "_" & shash & ".nims"
+    outFile = getNimbleTempDir() & ".out"
 
   let
     isScriptResultCopied =
@@ -42,12 +43,12 @@ proc execNimscript(nimsFile, projectDir, actionName: string, options: Options,
 
   let
     cmd = ("nim e --hints:off --verbosity:0 -p:" & (getTempDir() / "nimblecache").quoteShell &
-      " " & nimsFileCopied.quoteShell & " " & actionName).strip()
+      " " & nimsFileCopied.quoteShell & " " & outFile.quoteShell & " " & actionName).strip()
+
+  displayDebug("Executing " & cmd)
 
   if live:
     result.exitCode = execCmd(cmd)
-    let
-      outFile = nimsFileCopied & ".out"
     if outFile.fileExists():
       result.output = outFile.readFile()
       discard outFile.tryRemoveFile()