diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c2389d86..76aa2db4 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,151 +9,6 @@ on:
 
 jobs:
 
-  pymake_lint:
-    name: pymake linting
-    runs-on: ubuntu-latest
-
-    if: github.repository_owner == 'modflowpy'
-    steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2.3.4
-
-      - name: Set up Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.9
-
-      - name: Setup Graphviz
-        uses: ts-graphviz/setup-graphviz@v1
-
-      - name: Install packages
-        run: |
-          pip install requests pydotplus appdirs numpy matplotlib
-          pip install https://github.com/modflowpy/flopy/zipball/develop
-          pip install pylint flake8 black
-
-      - name: Run isort
-        run: |
-          echo "if isort check fails update isort using"
-          echo "  pip install isort --upgrade"
-          echo "and run"
-          echo "  isort ./flopy"
-          echo "and then commit the changes."
-          isort --verbose --check --diff ./pymake
-
-      - name: Run black
-        run: |
-          echo "if black check fails update black using"
-          echo "  pip install black --upgrade"
-          echo "and run"
-          echo "  black ./flopy"
-          echo "and then commit the changes."
-          black --check --diff ./pymake
-
-      - name: Run flake8
-        run: flake8 --count --show-source ./pymake
-
-      - name: Run pylint
-        run: pylint --jobs=0 --errors-only ./pymake
-
-  pymake_setup:
-    name: standard installation
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    defaults:
-      run:
-        shell: bash
-
-    steps:
-
-      # check out repo
-      - name: Checkout pymake repo
-        uses: actions/checkout@v2.3.4
-
-      - name: Setup Python
-        uses: actions/setup-python@v2.2.2
-        with:
-          python-version: 3.9
-
-      - name: Upgrade pip and install wheel
-        run: |
-          python -m pip install --upgrade pip
-          pip install wheel
-
-      - name: Base pymake installation
-        run: |
-          pip --verbose install .
-
-      - name: Print pymake version
-        run: |
-          python -c "import pymake; print(pymake.__version__)"
-
-  pymakeCI-os-gcc:
-    name: pymake CI gcc on different OSs
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ ubuntu-latest, macos-latest, windows-latest ]
-    defaults:
-      run:
-        shell: bash
-
-    steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2.3.4
-
-      - name: Setup Graphviz
-        if: runner.os == 'Linux'
-        uses: ts-graphviz/setup-graphviz@v1
-
-      - name: Set up Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.9
-
-      - name: Install python packages
-        run: |
-          .github/common/install-python.sh
-
-      - name: Setup symbolic link to gfortran on Linux
-        if: runner.os == 'Linux'
-        run: |
-          sudo ln -fs /usr/bin/gfortran-10 /usr/local/bin/gfortran
-          sudo ln -fs /usr/bin/gcc-10 /usr/local/bin/gcc
-          sudo ln -fs /usr/bin/g++-10 /usr/local/bin/g++
-
-      - name: Setup symbolic link to gfortran on macOS
-        if: runner.os == 'macOS'
-        run: |
-          sudo ln -fs /usr/local/bin/gfortran-10 /usr/local/bin/gfortran
-          sudo ln -fs /usr/local/bin/gcc-10 /usr/local/bin/gcc
-          sudo ln -fs /usr/local/bin/g++-10 /usr/local/bin/g++
-
-      - name: Print GNU compiler versions
-        run: |
-          gfortran --version
-          gcc --version
-          g++ --version
-
-      - name: Download examples for pytest runs
-        run: |
-          .github/common/download-examples.sh
-
-      - name: Run pytest
-        run: |
-          pytest -v --dist=loadfile -n=auto -m regression --durations=0 --cov=pymake --cov-report=xml autotest/
-
-      - name: Print coverage report before upload
-        run: |
-          coverage report
-
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1.0.15
-        with:
-          file: ./coverage.xml
-
   pymakeCI-os-intel:
     name: pymake CI intel on different OSs
     runs-on: ${{ matrix.os }}
@@ -277,155 +132,3 @@ jobs:
         if: runner.os == 'Linux' && steps.cache-install-linux.outputs.cache-hit != 'true'
         run: |
           .github/intel-scripts/cache_exclude_linux.sh
-
-  pymakeCI-gcc-prev:
-    name: pymake CI GCC 9 and 8
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        gcc-version: [ 9, 8 ]
-    defaults:
-      run:
-        shell: bash
-
-    steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2.3.4
-
-      - name: Setup Graphviz
-        uses: ts-graphviz/setup-graphviz@v1
-
-      - name: Set up Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.9
-
-      - name: Install python packages
-        run: |
-          .github/common/install-python.sh
-
-      - name: Setup symbolic link to gfortran on Linux
-        run: |
-          sudo ln -fs /usr/bin/gfortran-${{ matrix.gcc-version }} /usr/local/bin/gfortran
-          sudo ln -fs /usr/bin/gcc-${{ matrix.gcc-version }} /usr/local/bin/gcc
-          sudo ln -fs /usr/bin/g++-${{ matrix.gcc-version }} /usr/local/bin/g++
-
-      - name: Print GNU compiler versions
-        run: |
-          gfortran --version
-          gcc --version
-          g++ --version
-
-      - name: Download examples for pytest runs
-        run: |
-          .github/common/download-examples.sh
-
-      - name: Run pytest
-        run: |
-          pytest -v --dist=loadfile -n=auto -m base --durations=0 --cov=pymake --cov-report=xml autotest/
-
-      - name: Print coverage report before upload
-        run: |
-          coverage report
-
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1.0.15
-        with:
-          file: ./coverage.xml
-
-  pymakeCI-requests:
-    name: pymake CI requests
-    runs-on: ubuntu-latest
-    defaults:
-      run:
-        shell: bash
-
-    steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2.3.4
-
-      - name: Set up Python
-        uses: actions/setup-python@v2
-        with:
-          python-version: 3.9
-
-      - name: Install python packages
-        run: |
-          .github/common/install-python.sh
-
-      - name: Run pytest
-        run: |
-          pytest -v --dist=loadfile -n=auto -m requests --durations=0 --cov=pymake --cov-report=xml autotest/
-
-      - name: Print coverage report before upload
-        run: |
-          coverage report
-
-      - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1.0.15
-        with:
-          file: ./coverage.xml
-
-  pymakeCI-python-prev:
-    name: pymake CI with previous python versions
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: [ 3.8, 3.7 ]
-    defaults:
-      run:
-        shell: bash
-
-    steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2.3.4
-
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
-        with:
-          python-version: ${{ matrix.python-version }}
-
-      - name: Install python packages
-        run: |
-          .github/common/install-python.sh
-
-      - name: Setup symbolic link to gfortran on Linux
-        if: runner.os == 'Linux'
-        run: |
-          sudo ln -fs /usr/bin/gfortran-10 /usr/local/bin/gfortran
-          sudo ln -fs /usr/bin/gcc-10 /usr/local/bin/gcc
-          sudo ln -fs /usr/bin/g++-10 /usr/local/bin/g++
-
-      - name: Print GNU compiler versions
-        run: |
-          gfortran --version
-          gcc --version
-          g++ --version
-
-      - name: Download examples for pytest runs
-        run: |
-          .github/common/download-examples.sh
-
-      - name: Run pytest
-        run: |
-          pytest -v --dist=loadfile -n=auto -m base --durations=0
-
-  pymake_rtd:
-    name: pymake rtd
-    needs: pymakeCI-os-gcc
-    runs-on: ubuntu-latest
-    if:
-      github.event_name == 'push'
-    steps:
-      - name: Checkout repo
-        uses: actions/checkout@v2.3.4
-
-      - name: Trigger RTDs build
-        if: github.ref == 'refs/heads/master'
-        uses: dfm/rtds-action@v1.0.2
-        with:
-          webhook_url: ${{ secrets.RTDS_WEBHOOK_URL }}
-          webhook_token: ${{ secrets.RTDS_WEBHOOK_TOKEN }}
-          commit_ref: ${{ github.ref }}
diff --git a/.github/workflows/pymake-gcc.yml b/.github/workflows/pymake-gcc.yml
new file mode 100644
index 00000000..0bb20b19
--- /dev/null
+++ b/.github/workflows/pymake-gcc.yml
@@ -0,0 +1,176 @@
+name: pymake gcc build
+
+on:
+  schedule:
+    - cron: '0 3 * * 3' # run at 3 AM UTC every Wednesday
+  push:
+    branches: [ master ]
+  pull_request:
+
+jobs:
+
+  pymakeCI-os-gcc:
+    name: pymake CI gcc on different OSs
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2.3.4
+
+      - name: Setup Graphviz
+        if: runner.os == 'Linux'
+        uses: ts-graphviz/setup-graphviz@v1
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Install python packages
+        run: |
+          .github/common/install-python.sh
+
+      - name: Setup symbolic link to gfortran on Linux
+        if: runner.os == 'Linux'
+        run: |
+          sudo ln -fs /usr/bin/gfortran-10 /usr/local/bin/gfortran
+          sudo ln -fs /usr/bin/gcc-10 /usr/local/bin/gcc
+          sudo ln -fs /usr/bin/g++-10 /usr/local/bin/g++
+
+      - name: Setup symbolic link to gfortran on macOS
+        if: runner.os == 'macOS'
+        run: |
+          sudo ln -fs /usr/local/bin/gfortran-10 /usr/local/bin/gfortran
+          sudo ln -fs /usr/local/bin/gcc-10 /usr/local/bin/gcc
+          sudo ln -fs /usr/local/bin/g++-10 /usr/local/bin/g++
+
+      - name: Print GNU compiler versions
+        run: |
+          gfortran --version
+          gcc --version
+          g++ --version
+
+      - name: Download examples for pytest runs
+        run: |
+          .github/common/download-examples.sh
+
+      - name: Run pytest
+        run: |
+          pytest -v --dist=loadfile -n=auto -m regression --durations=0 --cov=pymake --cov-report=xml autotest/
+
+      - name: Print coverage report before upload
+        run: |
+          coverage report
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1.0.15
+        with:
+          file: ./coverage.xml
+
+  pymakeCI-gcc-prev:
+    name: pymake CI GCC 9 and 8
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        gcc-version: [ 9, 8 ]
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2.3.4
+
+      - name: Setup Graphviz
+        uses: ts-graphviz/setup-graphviz@v1
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Install python packages
+        run: |
+          .github/common/install-python.sh
+
+      - name: Setup symbolic link to gfortran on Linux
+        run: |
+          sudo ln -fs /usr/bin/gfortran-${{ matrix.gcc-version }} /usr/local/bin/gfortran
+          sudo ln -fs /usr/bin/gcc-${{ matrix.gcc-version }} /usr/local/bin/gcc
+          sudo ln -fs /usr/bin/g++-${{ matrix.gcc-version }} /usr/local/bin/g++
+
+      - name: Print GNU compiler versions
+        run: |
+          gfortran --version
+          gcc --version
+          g++ --version
+
+      - name: Download examples for pytest runs
+        run: |
+          .github/common/download-examples.sh
+
+      - name: Run pytest
+        run: |
+          pytest -v --dist=loadfile -n=auto -m base --durations=0 --cov=pymake --cov-report=xml autotest/
+
+      - name: Print coverage report before upload
+        run: |
+          coverage report
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1.0.15
+        with:
+          file: ./coverage.xml
+
+  pymakeCI-python-prev:
+    name: pymake CI with previous python versions
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [ 3.8, 3.7 ]
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2.3.4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install python packages
+        run: |
+          .github/common/install-python.sh
+
+      - name: Setup symbolic link to gfortran on Linux
+        if: runner.os == 'Linux'
+        run: |
+          sudo ln -fs /usr/bin/gfortran-10 /usr/local/bin/gfortran
+          sudo ln -fs /usr/bin/gcc-10 /usr/local/bin/gcc
+          sudo ln -fs /usr/bin/g++-10 /usr/local/bin/g++
+
+      - name: Print GNU compiler versions
+        run: |
+          gfortran --version
+          gcc --version
+          g++ --version
+
+      - name: Download examples for pytest runs
+        run: |
+          .github/common/download-examples.sh
+
+      - name: Run pytest
+        run: |
+          pytest -v --dist=loadfile -n=auto -m base --durations=0
diff --git a/.github/workflows/pymake-linting-install.yml b/.github/workflows/pymake-linting-install.yml
new file mode 100644
index 00000000..7a41c9df
--- /dev/null
+++ b/.github/workflows/pymake-linting-install.yml
@@ -0,0 +1,92 @@
+name: pymake linting/installation
+
+on:
+  schedule:
+    - cron: '0 3 * * 3' # run at 3 AM UTC every Wednesday
+  push:
+    branches: [ master ]
+  pull_request:
+
+jobs:
+
+
+  pymake_lint:
+    name: pymake linting
+    runs-on: ubuntu-latest
+
+    if: github.repository_owner == 'modflowpy'
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2.3.4
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Setup Graphviz
+        uses: ts-graphviz/setup-graphviz@v1
+
+      - name: Install packages
+        run: |
+          pip install requests pydotplus appdirs numpy matplotlib
+          pip install https://github.com/modflowpy/flopy/zipball/develop
+          pip install pylint flake8 black
+
+      - name: Run isort
+        run: |
+          echo "if isort check fails update isort using"
+          echo "  pip install isort --upgrade"
+          echo "and run"
+          echo "  isort ./flopy"
+          echo "and then commit the changes."
+          isort --verbose --check --diff ./pymake
+
+      - name: Run black
+        run: |
+          echo "if black check fails update black using"
+          echo "  pip install black --upgrade"
+          echo "and run"
+          echo "  black ./flopy"
+          echo "and then commit the changes."
+          black --check --diff ./pymake
+
+      - name: Run flake8
+        run: flake8 --count --show-source ./pymake
+
+      - name: Run pylint
+        run: pylint --jobs=0 --errors-only ./pymake
+
+  pymake_setup:
+    name: standard installation
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+
+      # check out repo
+      - name: Checkout pymake repo
+        uses: actions/checkout@v2.3.4
+
+      - name: Setup Python
+        uses: actions/setup-python@v2.2.2
+        with:
+          python-version: 3.9
+
+      - name: Upgrade pip and install wheel
+        run: |
+          python -m pip install --upgrade pip
+          pip install wheel
+
+      - name: Base pymake installation
+        run: |
+          pip --verbose install .
+
+      - name: Print pymake version
+        run: |
+          python -c "import pymake; print(pymake.__version__)"
+
diff --git a/.github/workflows/pymake-requests.yml b/.github/workflows/pymake-requests.yml
new file mode 100644
index 00000000..640c6ba9
--- /dev/null
+++ b/.github/workflows/pymake-requests.yml
@@ -0,0 +1,43 @@
+name: pymake requests
+
+on:
+  schedule:
+    - cron: '0 3 * * 3' # run at 3 AM UTC every Wednesday
+  push:
+    branches: [ master ]
+  pull_request:
+
+jobs:
+
+  pymakeCI-requests:
+    name: pymake CI requests
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2.3.4
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Install python packages
+        run: |
+          .github/common/install-python.sh
+
+      - name: Run pytest
+        run: |
+          pytest -v --dist=loadfile -n=auto -m requests --durations=0 --cov=pymake --cov-report=xml autotest/
+
+      - name: Print coverage report before upload
+        run: |
+          coverage report
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1.0.15
+        with:
+          file: ./coverage.xml
diff --git a/.github/workflows/pymake-rtd.yml b/.github/workflows/pymake-rtd.yml
new file mode 100644
index 00000000..3def7697
--- /dev/null
+++ b/.github/workflows/pymake-rtd.yml
@@ -0,0 +1,27 @@
+name: pymake rtd
+
+on:
+  schedule:
+    - cron: '0 3 * * 3' # run at 3 AM UTC every Wednesday
+  push:
+    branches: [ master ]
+  pull_request:
+
+jobs:
+
+  pymake_rtd:
+    name: pymake rtd
+    runs-on: ubuntu-latest
+    if:
+      github.event_name == 'push'
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2.3.4
+
+      - name: Trigger RTDs build
+        if: github.ref == 'refs/heads/master'
+        uses: dfm/rtds-action@v1.0.2
+        with:
+          webhook_url: ${{ secrets.RTDS_WEBHOOK_URL }}
+          webhook_token: ${{ secrets.RTDS_WEBHOOK_TOKEN }}
+          commit_ref: ${{ github.ref }}
diff --git a/pymake/pymake_base.py b/pymake/pymake_base.py
index ff45a822..7e12de5e 100644
--- a/pymake/pymake_base.py
+++ b/pymake/pymake_base.py
@@ -1468,7 +1468,7 @@ def _create_makefile(
     f.write(line)
 
     # get path to executable
-    dpth = make_dir
+    dpth = os.path.dirname(target)
     if len(dpth) > 0:
         dpth = os.path.relpath(dpth, make_dir)
     else:
@@ -1612,6 +1612,22 @@ def _create_makefile(
         line += f"\t\tFFLAGS ?= {' '.join(tfflags)}\n"
         line += "\t\tMODSWITCH = -module $(MODDIR)\n"
         line += "\tendif\n"
+        line += "\tifeq ($(FC), $(filter $(FC), ftn))\n"
+        tfflags = _get_fortran_flags(
+            target,
+            "ftn",
+            [],
+            debug,
+            double,
+            osname="linux",
+            sharedobject=sharedobject,
+            verbose=verbose,
+        )
+        for idx, flag in enumerate(tfflags):
+            if "-D__" in flag:
+                tfflags[idx] = "$(OS_macro)"
+        line += f"\t\tFFLAGS ?= {' '.join(tfflags)}\n"
+        line += "\tendif\n"
         line += "endif\n\n"
         f.write(line)
 
@@ -1795,6 +1811,21 @@ def _create_makefile(
         )
         line += f"\t\tLDFLAGS ?= {' '.join(tsyslibs)}\n"
         line += "\tendif\n"
+        # ftn compiler
+        line += "\tifeq ($(FC), $(filter $(FC), ftn))\n"
+        _, tsyslibs = _get_linker_flags(
+            target,
+            "ftn",
+            "clang",
+            [],
+            srcfiles,
+            osname="linux",
+            sharedobject=sharedobject,
+            verbose=verbose,
+        )
+        line += f"\t\tLDFLAGS ?= {' '.join(tsyslibs)}\n"
+        line += "\tendif\n"
+
     line += "endif\n\n"
     f.write(line)
 
diff --git a/pymake/utils/_compiler_switches.py b/pymake/utils/_compiler_switches.py
index 8af00c90..ad96ae92 100644
--- a/pymake/utils/_compiler_switches.py
+++ b/pymake/utils/_compiler_switches.py
@@ -332,6 +332,20 @@ def _get_fortran_flags(
                 flags += ["no-heap-arrays", "fpe0", "traceback"]
                 if double:
                     flags += ["r8", "autodouble"]
+        elif fc in ("ftn",):
+            if osname in ("win32", "darwin"):
+                raise ValueError(f"ftn compiler not supported on {osname}")
+            else:
+                if sharedobject:
+                    flags.append("f PIC")
+                else:
+                    if "f PIC" in flags:
+                        flags.remove("f PIC")
+                if debug:
+                    flags += ["g"]
+                flags += ["h noheap_allocate"]
+                if double:
+                    flags += ["s default64"]
 
         # process passed fortran flags - check for flags with a space between
         # the flag and a setting
@@ -613,6 +627,7 @@ def _get_linker_flags(
             if fc in (
                 "ifort",
                 "mpiifort",
+                "ftn",
             ):
                 gnu_compiler = False
         else:
@@ -621,6 +636,7 @@ def _get_linker_flags(
                 "mpiicc",
                 "icl",
                 "cl",
+                "clang",
             ):
                 gnu_compiler = False
         if osname == "win32":
@@ -789,6 +805,7 @@ def _set_fflags(target, fc="gfortran", argv=True, osname=None, verbose=False):
         ):
             if fc == "gfortran":
                 fflags += [
+                    "-fall-intrinsics",
                     "-Wtabs",
                     "-Wline-truncation",
                     "-Wunused-label",