diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 40e74430867a295e19d0445c15db9a06e6fc8a1c..5e1a7dab1eb98615586994b3b72f5158db34502e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -32,6 +32,7 @@ building_stage:
          - build/sphere/*
          - build/testing/*
          - build/trapping/*
+         - build/libnptm/*
          - doc/build/*
       exclude:
          - ".git*"
@@ -47,19 +48,19 @@ building_stage:
       - cat /etc/os-release
       - cd src
       - echo "Running make with gnu compilers version 11..."
-      - make clean && BUILDDIR=$PWD/../build_gnu11 CXX=g++-11 FC=gfortran-11 make
+      - make clean && BUILDDIR=$PWD/../build_gnu11 CXX=g++-11 FC=gfortran-11 make -j
       - echo "Running make with gnu compilers version 12..."
-      - make clean && BUILDDIR=$PWD/../build_gnu12 CXX=g++-12 FC=gfortran-12 make
+      - make clean && BUILDDIR=$PWD/../build_gnu12 CXX=g++-12 FC=gfortran-12 make -j
       - echo "Running make with gnu fortran version 12 and clang version 13..."
-      - make clean && BUILDDIR=$PWD/../build_clang13 CXX="clang++-13 -stdlib=libc++" FC=gfortran-12 make
+      - make clean && BUILDDIR=$PWD/../build_clang13 CXX="clang++-13 -stdlib=libc++" FC=gfortran-12 make -j
       - echo "Running make with gnu fortran version 12 and clang version 14..."
-      - make clean && BUILDDIR=$PWD/../build_clang14 CXX="clang++-14 -stdlib=libc++" FC=gfortran-12 make
+      - make clean && BUILDDIR=$PWD/../build_clang14 CXX="clang++-14 -stdlib=libc++" FC=gfortran-12 make -j
       - echo "Running make with gnu fortran version 12 and clang version 15..."
-      - make clean && BUILDDIR=$PWD/../build_clang15 CXX="clang++-15 -stdlib=libc++" FC=gfortran-12 make
+      - make clean && BUILDDIR=$PWD/../build_clang15 CXX="clang++-15 -stdlib=libc++" FC=gfortran-12 make -j
       - echo "Running make with gnu fortran version 12 and clang version 16..."
-      - make clean && BUILDDIR=$PWD/../build_clang16 CXX="clang++-16 -stdlib=libc++" FC=gfortran-12 make
+      - make clean && BUILDDIR=$PWD/../build_clang16 CXX="clang++-16 -stdlib=libc++" FC=gfortran-12 make -j
       - echo "Finally running make with default compilers..."
-      - make clean && make
+      - make clean && make -j
       - make docs -j && make -C ../doc/build/latex -j
 
 running_stage: