diff --git a/.github/workflows/main_push.yml b/.github/workflows/main_push.yml
index 0d002fe..ec07e94 100644
--- a/.github/workflows/main_push.yml
+++ b/.github/workflows/main_push.yml
@@ -4,6 +4,10 @@ on:
   push:
     branches:
       - main
+    paths-ignore:
+      - '.gitignore'
+      - 'LICENSE'
+      - '*.rst'
 
 jobs:
   check-platform-builds:
@@ -50,7 +54,7 @@ jobs:
         conan profile update "settings.compiler=Visual Studio" default
         conan profile update "settings.compiler.version=17" default
         conan config set "storage.path=$env:GITHUB_WORKSPACE/conan_data"
-        conan install --build=openssl --install-folder conan_build .
+        conan install --build=missing --install-folder conan_build .
 
     - uses: pypa/cibuildwheel@v2.3.1
       env:
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index f4edf37..638a7b5 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -4,9 +4,17 @@ on:
   pull_request:
     branches:
       - main
+    paths-ignore:
+      - '.gitignore'
+      - 'LICENSE'
+      - '*.rst'
   push:
     branches:
       - main
+    paths-ignore:
+      - '.gitignore'
+      - 'LICENSE'
+      - '*.rst'
 
 jobs:
   test:
@@ -23,7 +31,7 @@ jobs:
         python-version: "3.7"
 
     - name: "Install system dependencies"
-      run: sudo apt update -y && sudo apt install -y libssl-dev libasio-dev
+      run: sudo apt update -y && sudo apt install -y libssl-dev libasio-dev libglpk-dev glpk-utils
 
     - name: "Install python environment"
       run: |
diff --git a/README.rst b/README.rst
index e7921c7..036b82f 100644
--- a/README.rst
+++ b/README.rst
@@ -123,7 +123,7 @@ To install using Conan, do the following:
 .. code:: bash
 
   cd pyvroom/
-  conan install --build=openssl --install-folder conan_build .
+  conan install --build=missing --install-folder conan_build .
 
 Documentation
 -------------
diff --git a/conanfile.txt b/conanfile.txt
index 72a05a6..ce267b3 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -1,6 +1,7 @@
 [requires]
 openssl/1.1.1m
 asio/1.21.0
+glpk/5.0
 
 [generators]
 json
diff --git a/pyproject.toml b/pyproject.toml
index dd703e9..c33a0dc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,6 +32,7 @@ before-all = """
 yum update -y
 yum install -y epel-release
 yum install -y openssl-devel asio-devel
+yum install -y glpk-devel glpk-utils
 """
 
 [[tool.cibuildwheel.overrides]]
@@ -39,10 +40,12 @@ select = "*musllinux*"
 before-all = """
 apk add asio-dev
 apk add openssl-dev
+apk add glpk
 """
 
 [tool.cibuildwheel.macos]
 
 before-all = """
 brew install asio
+brew install glpk
 """
diff --git a/setup.py b/setup.py
index 8d838ef..3f429d4 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,8 @@
         "-DWIN32_LEAN_AND_MEAN",
         "-DASIO_STANDALONE",
         "-DUSE_PYTHON_BINDINGS",
-        "-DUSE_ROUTING=true"
+        "-DUSE_ROUTING=true",
+        "-DUSE_LIBGLPK=true",
     ]
     extra_link_args = []
 
@@ -37,12 +38,14 @@
         "-DASIO_STANDALONE",
         "-DNDEBUG",
         "-DUSE_PYTHON_BINDINGS",
-        "-DUSE_ROUTING=true"
+        "-DUSE_ROUTING=true",
+        "-DUSE_LIBGLPK=true",
     ]
     extra_link_args = [
         "-lpthread",
         "-lssl",
         "-lcrypto",
+        "-lglpk",
     ]
 
     if platform.system() == "Darwin":
diff --git a/src/_vroom.cpp b/src/_vroom.cpp
index 3f62b2e..2a66b54 100644
--- a/src/_vroom.cpp
+++ b/src/_vroom.cpp
@@ -30,7 +30,8 @@
 #include "algorithms/heuristics/heuristics.cpp"
 #include "algorithms/local_search/local_search.cpp"
 #include "algorithms/local_search/operator.cpp"
-#include "algorithms/validation/check.h"
+#include "algorithms/validation/check.cpp"
+#include "algorithms/validation/choose_ETA.cpp"
 
 // #include "routing/libosrm_wrapper.cpp"
 #include "routing/http_wrapper.cpp"