diff --git a/.circleci/config.yml b/.circleci/config.yml
index 933a2d578..e5ae01433 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,6 +2,10 @@ version: 2.1
 orbs:
   go: gotest/tools@0.0.9
 
+executors:
+  golang:
+    docker:
+      - image: circleci/golang:1.13
 
 commands:
   install-deps:
@@ -22,9 +26,6 @@ commands:
             - 'v2-lotus-params-'
           paths:
             - /var/tmp/filecoin-proof-parameters/
-      - run:
-          command: GO111MODULE=on go get github.com/ipfs/ipget@c0cbd7d9d1925965a5aa0895d5ff32dbdb4a009e
-          working_directory: "~"
       - run:  make build/.params-1024
       - save_cache:
           name: Save parameters cache
@@ -35,7 +36,7 @@ commands:
 
 jobs:
   mod-tidy-check:
-    executor: go/circleci-golang
+    executor: golang
     steps:
       - install-deps
       - prepare
@@ -48,7 +49,7 @@ jobs:
     parameters:
       executor:
         type: executor
-        default: go/circleci-golang
+        default: golang
       go-test-flags:
         type: string
         default: ""
@@ -116,7 +117,7 @@ jobs:
     parameters:
       executor:
         type: executor
-        default: go/circleci-golang
+        default: golang
       golangci-lint-version:
         type: string
         default: 1.17.1
diff --git a/Makefile b/Makefile
index 2d4f46e17..ae7b13f64 100644
--- a/Makefile
+++ b/Makefile
@@ -51,7 +51,7 @@ build/.update-modules:
 ## PROOFS
 
 bin/ipget:
-	./bin/dist_get /ipns/dist.ipfs.io ipget bin/ipget v0.4.0
+	./bin/dist_get /ipns/dist.ipfs.io ipget bin/ipget v0.5.0
 
 PARAM_SECTOR_SIZES:=1024 16777216 268435456 1073741824
 PARAM_SECTOR_SIZES:=$(addprefix build/.params-,$(PARAM_SECTOR_SIZES))
diff --git a/lib/sectorbuilder/sectorbuilder.go b/lib/sectorbuilder/sectorbuilder.go
index 35b3f868b..4613750ae 100644
--- a/lib/sectorbuilder/sectorbuilder.go
+++ b/lib/sectorbuilder/sectorbuilder.go
@@ -159,12 +159,12 @@ func toReadableFile(r io.Reader, n int64) (*os.File, func() error, error) {
 		return nil, nil, err
 	}
 
-	var copyWait sync.WaitGroup
-	copyWait.Add(1)
+	var wait sync.Mutex
 	var werr error
 
+	wait.Lock()
 	go func() {
-		defer copyWait.Done()
+		defer wait.Unlock()
 
 		_, werr = io.CopyN(w, r, n)
 
@@ -175,7 +175,7 @@ func toReadableFile(r io.Reader, n int64) (*os.File, func() error, error) {
 	}()
 
 	return f, func() error {
-		copyWait.Wait()
-		return nil
+		wait.Lock()
+		return werr
 	}, nil
 }
diff --git a/lib/sectorbuilder/sectorbuilder_test.go b/lib/sectorbuilder/sectorbuilder_test.go
index ebe28cfac..fe346dcb3 100644
--- a/lib/sectorbuilder/sectorbuilder_test.go
+++ b/lib/sectorbuilder/sectorbuilder_test.go
@@ -34,15 +34,9 @@ func TestSealAndVerify(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	fi, err := ioutil.TempFile("", "sbtestfi")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer fi.Close()
+	r := io.LimitReader(rand.New(rand.NewSource(42)), 1016)
 
-	io.CopyN(fi, rand.New(rand.NewSource(42)), 1016)
-
-	if _, err := sb.AddPiece("foo", 1016, fi.Name()); err != nil {
+	if _, err := sb.AddPiece("foo", 1016, r); err != nil {
 		t.Fatal(err)
 	}