sbt publish generates html instead of class - scala

Question

I have a scala library that i'm packaging with sbt, in my local bash, i can publish it succesfully to nexus, but when i use gitlab ci/cd with same command (sbt publish) the generated jar contains only html files:
here's my build.sbt:
organization := "com.example"
name := "liblib"
version := "1.0"
publishTo := Some("nexus" at "nexus/repo")
credentials += Credentials(Path.userHome / ".sbt" / ".credentials")
and my gitlab.ci
package:
stage: build
image: scala-sbt:8u312_1.5.5_2.12.15
script:
# Build
- sbt clean test:compile
# Test
- sbt coverage test
- sbt coverageReport
- mv target target-for-sonar
# Package
- sbt clean compile package
artifacts:
name: "$CI_JOB_NAME artifacts from $CI_PROJECT_NAME on $CI_COMMIT_REF_SLUG"
paths:
- target
- target-for-sonar
expire_in: 1 week
publish:
stage: publish
image: scala-sbt:8u312_1.5.5_2.12.15
script:
- sbt publish
rules:
- when: manual