Unique nims filename to enable parallelism

src/nimblepkg/nimscriptwrapper.nim

@@ -24,8 +24,7 @@ const
 proc execNimscript(nimsFile, projectDir, actionName: string, options: Options,
   live = true): tuple[output: string, exitCode: int] =
   let
-    shash = $projectDir.hash().abs()
-    nimsFileCopied = projectDir / nimsFile.splitFile().name & "_" & shash & ".nims"
+    nimsFileCopied = projectDir / nimsFile.splitFile().name & "_" & getProcessId() & ".nims"
     outFile = getNimbleTempDir() & ".out"
 
   let

src/nimblepkg/tools.nim

@@ -148,6 +148,15 @@ proc contains*(j: JsonNode, elem: tuple[key: string, val: JsonNode]): bool =
 
 when not defined(windows):
   from posix import getpid
+
+proc getProcessId*(): string =
+  when defined(windows):
+    proc GetCurrentProcessId(): int32 {.stdcall, dynlib: "kernel32",
+                                        importc: "GetCurrentProcessId".}
+    result = $GetCurrentProcessId()
+  else:
+    result = $getpid()
+
 proc getNimbleTempDir*(): string =
   ## Returns a path to a temporary directory.
   ##
@@ -155,13 +164,7 @@ proc getNimbleTempDir*(): string =
   ## different for different runs of it. You have to make sure to create it
   ## first. In release builds the directory will be removed when nimble finishes
   ## its work.
-  result = getTempDir() / "nimble_"
-  when defined(windows):
-    proc GetCurrentProcessId(): int32 {.stdcall, dynlib: "kernel32",
-                                        importc: "GetCurrentProcessId".}
-    result.add($GetCurrentProcessId())
-  else:
-    result.add($getpid())
+  result = getTempDir() / "nimble_" & getProcessId()
 
 proc getNimbleUserTempDir*(): string =
   ## Returns a path to a temporary directory.