diff --git a/src/nimblepkg/nimscriptwrapper.nim b/src/nimblepkg/nimscriptwrapper.nim
index 10cfae8..fa8f8f0 100644
--- a/src/nimblepkg/nimscriptwrapper.nim
+++ b/src/nimblepkg/nimscriptwrapper.nim
@@ -40,10 +40,18 @@ proc execNimscript(nimsFile, projectDir, actionName: string, options: Options):
     if not isScriptResultCopied:
       nimsFileCopied.removeFile()
 
-  let
+  var
     cmd = ("nim e --hints:off --verbosity:0 -p:" & (getTempDir() / "nimblecache").quoteShell &
       " " & nimsFileCopied.quoteShell & " " & outFile.quoteShell & " " & actionName).strip()
 
+  if options.action.typ == actionCustom and actionName != "printPkgInfo":
+    for i in options.action.arguments:
+      cmd &= " " & i.quoteShell()
+    for key, val in options.action.flags.pairs():
+      cmd &= " $#$#" % [if key.len == 1: "-" else: "--", key]
+      if val.len != 0:
+        cmd &= ":" & val.quoteShell()
+
   displayDebug("Executing " & cmd)
 
   result.exitCode = execCmd(cmd)
diff --git a/tests/issue633/issue633.nimble b/tests/issue633/issue633.nimble
new file mode 100644
index 0000000..cb786eb
--- /dev/null
+++ b/tests/issue633/issue633.nimble
@@ -0,0 +1,16 @@
+# Package
+
+version     = "0.1.0"
+author      = "GT"
+description = "Package for ensuring that issue #633 is resolved."
+license     = "MIT"
+
+# Dependencies
+
+requires "nim >= 0.19.6"
+# to reproduce dependency 2 must be before 1
+
+task testTask, "Test":
+  for i in 0 .. paramCount():
+    if paramStr(i) == "--testTask":
+      echo "Got it"
diff --git a/tests/tester.nim b/tests/tester.nim
index 09427e8..c2aefc3 100644
--- a/tests/tester.nim
+++ b/tests/tester.nim
@@ -864,3 +864,8 @@ test "do not install single dependency multiple times (#678)":
       let (output, exitCode) = execNimble("install", "-y")
       check exitCode == QuitSuccess
       check output.find("issue678_dependency_1@0.1.0 already exists") == -1
+
+test "Passing command line arguments to a task (#633)":
+  cd "issue633":
+    var (output, exitCode) = execNimble("testTask --testTask")
+    check output.contains("Got it")