diff --git a/compile-and-install-gromacs-2018.sh b/compile-and-install-gromacs-2018.sh
new file mode 100644
index 00000000..4f5dda30
--- /dev/null
+++ b/compile-and-install-gromacs-2018.sh
@@ -0,0 +1,89 @@
+if [ -f "/etc/arch-release" ]; then
+	if pacman -Qi paru > /dev/null; then
+		echo ">>> GROMACS já instalado"
+	else
+	# Enter working dir
+    cd libs/gromacs
+
+    # Unzip GROMACS source code
+    unzip gromacs.zip
+
+    # Make and prepare GROMACS build folder
+    mkdir -p build
+    cd build
+    cmake ../gromacs-2018/ \
+        -DCMAKE_INSTALL_PREFIX=/usr/ \
+        -DCMAKE_INSTALL_LIBDIR=lib \
+        -DGMX_BUILD_OWN_FFTW=off \
+        -DGMX_HWLOC=off
+
+    # Build GROMACS
+    make -j$(nproc)
+
+    # Then check our build
+    make check
+
+    # Install our package
+    sudo make install
+
+    # Append GMXRC to our .zshrc or .bash_profile
+    if [ -f ~/.zshrc ]; then
+        if ! grep -Fxq "source /usr/bin/GMXRC" ~/.zshrc; then
+            # Not written, so write
+            echo "source /usr/bin/GMXRC" >> ~/.zshrc
+        fi
+    else
+        if ! grep -Fxq "source /usr/local/gromacs/bin/GMXRC" ~/.bash_profile; then
+            # Not written, so write
+            echo "source /usr/local/gromacs/bin/GMXRC" >> ~/.bash_profile
+        fi
+    fi
+
+    # Leave working dir/go back to visualdynamics root
+    cd ../../..
+	fi
+else
+	if dpkg -s gromacs &> /dev/null; then
+		echo "GROMACS already installed"
+	else
+		# Enter working dir
+    cd libs/gromacs
+
+    # Unzip GROMACS source code
+    unzip gromacs.zip
+
+    # Make and prepare GROMACS build folder
+    mkdir -p build
+    cd build
+    cmake ../gromacs-2018/ \
+        -DCMAKE_INSTALL_PREFIX=/usr/ \
+        -DCMAKE_INSTALL_LIBDIR=lib \
+        -DGMX_BUILD_OWN_FFTW=off \
+        -DGMX_HWLOC=off
+
+    # Build GROMACS
+    make -j$(nproc)
+
+    # Then check our build
+    make check
+
+    # Install our package
+    sudo make install
+
+    # Append GMXRC to our .zshrc or .bash_profile
+    if [ -f ~/.zshrc ]; then
+        if ! grep -Fxq "source /usr/bin/GMXRC" ~/.zshrc; then
+            # Not written, so write
+            echo "source /usr/bin/GMXRC" >> ~/.zshrc
+        fi
+    else
+        if ! grep -Fxq "source /usr/local/gromacs/bin/GMXRC" ~/.bash_profile; then
+            # Not written, so write
+            echo "source /usr/local/gromacs/bin/GMXRC" >> ~/.bash_profile
+        fi
+    fi
+
+    # Leave working dir/go back to visualdynamics root
+    cd ../../..
+	fi
+fi
\ No newline at end of file
diff --git a/install.sh b/install.sh
index 8dc76d72..77a7f0ce 100755
--- a/install.sh
+++ b/install.sh
@@ -45,46 +45,7 @@ if [ $resp = 'y' ]; then
         sudo apt install cmake gcc python3 python3-pip git grace unzip fftw3 -y
     fi
 
-    ## TODO: Install GROMACS 2018
-    # Enter working dir
-    cd libs/gromacs
-
-    # Unzip GROMACS source code
-    unzip gromacs.zip
-
-    # Make and prepare GROMACS build folder
-    mkdir -p build
-    cd build
-    cmake ../gromacs-2018/ \
-        -DCMAKE_INSTALL_PREFIX=/usr/ \
-        -DCMAKE_INSTALL_LIBDIR=lib \
-        -DGMX_BUILD_OWN_FFTW=off \
-        -DGMX_HWLOC=off
-
-    # Build GROMACS
-    make -j$(nproc)
-
-    # Then check our build
-    make check
-
-    # Install our package
-    sudo make install
-
-    # Append GMXRC to our .zshrc or .bash_profile
-    if [ -f ~/.zshrc ]; then
-        if ! grep -Fxq "source /usr/bin/GMXRC" ~/.zshrc; then
-            # Not written, so write
-            echo "source /usr/bin/GMXRC" >> ~/.zshrc
-        fi
-    else
-        if ! grep -Fxq "source /usr/local/gromacs/bin/GMXRC" ~/.bash_profile; then
-            # Not written, so write
-            echo "source /usr/local/gromacs/bin/GMXRC" >> ~/.bash_profile
-        fi
-    fi
-
-    # Leave working dir/go back to visualdynamics root
-    cd ../../..
+    source compile-and-install-gromacs-2018.sh
 
     # Install and initialize our virtual environment
     sudo pip3 install virtualenv