diff --git a/plugins/builder/functions.go b/plugins/builder/functions.go
new file mode 100644
index 000000000..eb90e10ab
--- /dev/null
+++ b/plugins/builder/functions.go
@@ -0,0 +1,20 @@
+package builder
+
+import (
+	"io/ioutil"
+	"os"
+	"path"
+)
+
+func removeAllContents(basePath string) error {
+	dir, err := ioutil.ReadDir(basePath)
+	if err != nil {
+		return err
+	}
+
+	for _, d := range dir {
+		os.RemoveAll(path.Join([]string{basePath, d.Name()}...))
+	}
+
+	return nil
+}
diff --git a/plugins/builder/go.mod b/plugins/builder/go.mod
index a382f3f9c..e96f12bc1 100644
--- a/plugins/builder/go.mod
+++ b/plugins/builder/go.mod
@@ -3,10 +3,11 @@ module github.com/dokku/dokku/plugins/builder
 go 1.15
 
 require (
-  github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0
-  github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27
-  github.com/dokku/dokku/plugins/common v0.0.0-00010101000000-000000000000
-  github.com/spf13/pflag v1.0.5 // indirect
+	github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0
+	github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27
+	github.com/dokku/dokku/plugins/common v0.0.0-00010101000000-000000000000
+	github.com/otiai10/copy v1.6.0
+	github.com/spf13/pflag v1.0.5 // indirect
 )
 
 replace github.com/dokku/dokku/plugins/common => ../common
diff --git a/plugins/builder/go.sum b/plugins/builder/go.sum
index 58c904707..0b2bcb52a 100644
--- a/plugins/builder/go.sum
+++ b/plugins/builder/go.sum
@@ -2,6 +2,12 @@ github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0 h1:sDMmm+q/3+Bu
 github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0/go.mod h1:4Zcjuz89kmFXt9morQgcfYZAYZ5n8WHjt81YYWIwtTM=
 github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27 h1:HHUr4P/aKh4quafGxDT9LDasjGdlGkzLbfmmrlng3kA=
 github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27/go.mod h1:VQx0hjo2oUeQkQUET7wRwradO6f+fN5jzXgB/zROxxE=
+github.com/otiai10/copy v1.6.0 h1:IinKAryFFuPONZ7cm6T6E2QX/vcJwSnlaA5lfoaXIiQ=
+github.com/otiai10/copy v1.6.0/go.mod h1:XWfuS3CrI0R6IE0FbgHsEazaXO8G0LpMp9o8tos0x4E=
+github.com/otiai10/curr v0.0.0-20150429015615-9b4961190c95/go.mod h1:9qAhocn7zKJG+0mI8eUu6xqkFDYS2kb2saOteoSB3cE=
+github.com/otiai10/curr v1.0.0/go.mod h1:LskTG5wDwr8Rs+nNQ+1LlxRjAtTZZjtJW4rMXl6j4vs=
+github.com/otiai10/mint v1.3.0/go.mod h1:F5AjcsTsWUqX+Na9fpHb52P8pcRX2CI6A3ctIT91xUo=
+github.com/otiai10/mint v1.3.2/go.mod h1:/yxELlJQ0ufhjUwhshSj+wFjZ78CnZ48/1wtmBH1OTc=
 github.com/ryanuber/columnize v1.1.2-0.20190319233515-9e6335e58db3 h1:utdYOikI1XjNtTFGCwSM6OmFJblU4ld4gACoJsbadJg=
 github.com/ryanuber/columnize v1.1.2-0.20190319233515-9e6335e58db3/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
diff --git a/plugins/builder/triggers.go b/plugins/builder/triggers.go
index b0c0bfe03..b711f8a7c 100644
--- a/plugins/builder/triggers.go
+++ b/plugins/builder/triggers.go
@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"github.com/dokku/dokku/plugins/common"
+	"github.com/otiai10/copy"
 )
 
 // TriggerBuilderDetect outputs a manually selected builder for the app
@@ -42,19 +43,19 @@ func TriggerCorePostExtract(appName string, sourceWorkDir string) error {
 		return fmt.Errorf("Unable to create temporary working directory: %v", err.Error())
 	}
 
-	if err := os.RemoveAll(tmpWorkDir); err != nil {
+	if err := removeAllContents(tmpWorkDir); err != nil {
 		return fmt.Errorf("Unable to clear out temporary working directory for rewrite: %v", err.Error())
 	}
 
-	if err := os.Rename(newSourceWorkDir, tmpWorkDir); err != nil {
+	if err := copy.Copy(newSourceWorkDir, tmpWorkDir); err != nil {
 		return fmt.Errorf("Unable to move build-dir to temporary working directory: %v", err.Error())
 	}
 
-	if err := os.RemoveAll(sourceWorkDir); err != nil {
+	if err := removeAllContents(sourceWorkDir); err != nil {
 		return fmt.Errorf("Unable to clear out sourcecode working directory for rewrite: %v", err.Error())
 	}
 
-	if err := os.Rename(tmpWorkDir, sourceWorkDir); err != nil {
+	if err := copy.Copy(tmpWorkDir, sourceWorkDir); err != nil {
 		return fmt.Errorf("Unable to move build-dir to sourcecode working directory: %v", err.Error())
 	}