diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 3c587652..e5e8c46a 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -116,3 +116,50 @@ jobs:
             ./build/matdump -d ./share/test_file.mat structure
             ./build/matdump -v ./share/test_file.mat
             ./build/matdump -v -f whos ./share/test_file.mat
+
+  build-solaris:
+    runs-on: ubuntu-latest
+    name: solaris-gcc
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 5
+      - name: Test with gcc
+        uses: vmactions/solaris-vm@v1
+        with:
+          release: 11.4-gcc
+          usesh: true
+          copyback: false
+          prepare: |
+            set -e
+            pkg install cmake
+          run: |
+            set -e
+            cmake -S . -B build -DCMAKE_BUILD_TYPE=Release -DMATIO_SHARED=OFF -DMATIO_MAT73=OFF
+            cmake --build build -- -j8
+            ./build/test_snprintf
+            ./build/test_mat -H
+            ./build/test_mat -L
+            ./build/test_mat -V
+            ./build/matdump -v -H
+            ./build/matdump -V
+            ./build/matdump -d ./share/test_file.mat structure
+            ./build/matdump -v ./share/test_file.mat
+            ./build/matdump -v -f whos ./share/test_file.mat
+
+  build-cygwin:
+    runs-on: windows-latest
+    name: windows-cygwin
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 5
+      - name: Setup Cygwin environment
+        uses: egor-tensin/setup-cygwin@v4
+        with:
+          packages: cmake gcc-g++ conan
+      - name: Configure Release
+        run: |
+          cmake.exe -S . -B build -DCMAKE_BUILD_TYPE=Release -DMATIO_USE_CONAN=ON -DMATIO_SHARED=OFF -G "Unix Makefiles"