diff --git a/src/main/nim/strawbosspkg/core.nim b/src/main/nim/strawbosspkg/core.nim
index ae11a5d..e99d228 100644
--- a/src/main/nim/strawbosspkg/core.nim
+++ b/src/main/nim/strawbosspkg/core.nim
@@ -228,7 +228,7 @@ proc setupProject(wksp: Workspace) =
   wksp.sendMsg(lvlDebug, "Setting up project.")
 
   # Clone the project into the $temp directory
-  let cloneArgs = ["clone", wksp.projectDef.repo, wksp.dir]
+  let cloneArgs = @["clone", wksp.projectDef.repo, wksp.dir]
   wksp.sendMsg(lvlDebug, "git " & $cloneArgs)
 
   let cloneResult = exec("git", ".", cloneArgs, wksp.env, {poUsePath},
@@ -238,7 +238,7 @@ proc setupProject(wksp: Workspace) =
     raiseEx "unable to clone repo for '" & wksp.projectDef.name & "'"
 
   # Checkout the requested ref
-  let checkoutArgs = ["checkout", wksp.buildRef]
+  let checkoutArgs = @["checkout", wksp.buildRef]
   wksp.sendMsg(lvlDebug, "git " & $checkoutArgs)
 
   let checkoutResult = exec("git", wksp.dir, checkoutArgs,
diff --git a/strawboss.projectdef.json b/strawboss.projectdef.json
index f2c2d9e..ac47782 100644
--- a/strawboss.projectdef.json
+++ b/strawboss.projectdef.json
@@ -3,27 +3,31 @@
   "steps": {
     "compile": {
       "artifacts": ["strawboss"],
-      "stepCmd": "nimble build"
+      "stepCmd": "docker run -v `pwd`:/usr/src/strawboss -w /usr/src/strawboss jdbernard/nim:0.17.2 nimble build"
     },
     "unittest": {
       "depends": ["compile"],
+      "stepCmd": "docker run -v `pwd`:/usr/src/strawboss -v $compile_DIR:/usr/build/strawboss -w /usr/src/strawboss -i jdbernard/nim:0.17.2 /bin/bash",
       "cmdInput": [
-        "cp $build_DIR/strawboss .",
+        "cp /usr/build/strawboss/strawboss .",
         "nim c -r src/test/nim/run_unit_tests"
       ]
     },
     "functest": {
       "depends": ["compile"],
+      "stepCmd": "docker run -v `pwd`:/usr/src/strawboss -v $compile_DIR:/usr/build/strawboss -w /usr/src/strawboss -i jdbernard/nim:0.17.2 /bin/bash",
       "cmdInput": [
-        "cp $build_DIR/strawboss .",
+        "cp /usr/build/strawboss/strawboss .",
         "nim c -r src/test/nim/run_functional_tests"
       ]
     },
     "build": {
       "artifacts": ["strawboss-$VERSION.zip"],
       "depends": ["compile", "unittest", "functest"],
+      "stepCmd": "docker run -v `pwd`:/usr/src/strawboss -v $compile_DIR:/usr/build/strawboss -w /usr/src/strawboss -i jdbernard/nim:0.17.2 /bin/bash",
       "cmdInput": [
-        "zip strawboss-$VERSION.zip $compile_DIR/strawboss \",
+        "cp /usr/build/strawboss/strawboss .",
+        "zip strawboss-$VERSION.zip strawboss \ ",
         "  strawboss.config.json example.json \ ",
         "  src/main/systemd/strawboss.service"
       ]