insecure registry regression ?

skaffold doesn't seem to take into account the insecure registry in its latest version, is it a regression or something misconfigured?

apiVersion: skaffold/v2beta1
kind: Config
build:
  insecureRegistries: 
  - nexus.foo.net
  tagPolicy:
    sha256: {}
  artifacts:
  - context: .
    image: go-hello-world
  local:
    push: true 
deploy:
  kubectl:
    manifests:
    - kubernetes-manifests/**

skaffold run  -v debug --filename skaffold.yaml --default-repo nexus.foo.net/foo --insecure-registry nexus.foo.net 
INFO[0000] Skaffold &{Version:v1.6.0-docs ConfigVersion:skaffold/v2beta1 GitVersion: GitCommit:b74e2f94f628b16a866abddc2ba8f05ce0bf956c GitTreeState:clean BuildDate:2020-03-25T00:09:12Z GoVersion:go1.14 Compiler:gc Platform:linux/amd64} 
DEBU[0000] found config for context "minikube"          
DEBU[0000] validating yamltags of struct SkaffoldConfig 
DEBU[0000] validating yamltags of struct Metadata       
DEBU[0000] validating yamltags of struct Pipeline       
DEBU[0000] validating yamltags of struct BuildConfig    
DEBU[0000] validating yamltags of struct Artifact       
DEBU[0000] validating yamltags of struct ArtifactType   
DEBU[0000] validating yamltags of struct DockerArtifact 
DEBU[0000] validating yamltags of struct TagPolicy      
DEBU[0000] validating yamltags of struct ShaTagger      
DEBU[0000] validating yamltags of struct BuildType      
DEBU[0000] validating yamltags of struct LocalBuild     
DEBU[0000] validating yamltags of struct DeployConfig   
DEBU[0000] validating yamltags of struct DeployType     
DEBU[0000] validating yamltags of struct KubectlDeploy  
DEBU[0000] validating yamltags of struct KubectlFlags   
INFO[0000] Using kubectl context: minikube              
DEBU[0000] Using builder: local                         
DEBU[0000] Running command: [minikube docker-env --shell none] 
DEBU[0000] Command output: [DOCKER_TLS_VERIFY=1
DOCKER_HOST=tcp://192.168.99.102:2376
DOCKER_CERT_PATH=/home/foo/.minikube/certs
MINIKUBE_ACTIVE_DOCKERD=minikube
] 
DEBU[0000] setting Docker user agent to skaffold-v1.6.0-docs 
Generating tags...
 - go-hello-world -> nexus.foo.net/foo/go-hello-world:latest
INFO[0000] Tags generated in 64.344µs                   
Checking cache...
DEBU[0000] Found dependencies for dockerfile: [{go.mod /src/hello-world true} {go.sum /src/hello-world true} {. /src/hello-world true}] 
 - go-hello-world: Not found. Building
INFO[0000] Cache check complete in 1.802348ms           
Found [minikube] context, using local docker daemon.
Building [go-hello-world]...
DEBU[0000] Running command: [docker build . --file /home/foo/kubernetes/golang/go-hello-world/Dockerfile -t nexus.foo.net/foo/go-hello-world:latest] 
Sending build context to Docker daemon  60.42kB
Step 1/7 : FROM golang:1.14
 ---> 374d57ff6662
Step 2/7 : WORKDIR /src/hello-world
 ---> Using cache
 ---> 6bf66efe1427
Step 3/7 : COPY go.mod go.sum ./
 ---> Using cache
 ---> 7ca0b4bcc8f9
Step 4/7 : RUN go mod download
 ---> Using cache
 ---> 393f43ee8bd8
Step 5/7 : COPY . ./
 ---> Using cache
 ---> fd357c8a75d7
Step 6/7 : RUN go build -o /app -v ./cmd/hello-world
 ---> Using cache
 ---> af198b2dadf5
Step 7/7 : ENTRYPOINT ["/app"]
 ---> Using cache
 ---> c52e6c26b703
Successfully built c52e6c26b703
Successfully tagged nexus.foo.net/foo/go-hello-world:latest
The push refers to repository [nexus.foo.net/foo/go-hello-world]
FATA[0001] failed to build: build failed: building [go-hello-world]: build artifact: Get https://nexus.foo.net/v2/: dial tcp 10.196.80.185:443: connect: connection refused