Try using isal system prebuilt lib like blosc2

.github/workflows/CI.yml

@@ -154,10 +154,8 @@ jobs:
             -e BLOSC2_INSTALL_PREFIX=${{ github.workspace }}/blosc2
             -e ISAL_INSTALL_PREFIX=${{ github.workspace }}/isal
             -e LD_LIBRARY_PATH=${{ github.workspace }}/blosc2/lib:${{ github.workspace }}/blosc2/lib64:${{ github.workspace }}/isal/lib:${{ github.workspace }}/isal/lib64
-          args: -i ${{ matrix.python-version }} --release --out dist --features use-system-blosc2-static
+          args: -i ${{ matrix.python-version }} --release --out dist --features use-system-blosc2-static --features use-system-isal-static
           before-script-linux: |
-            apt update
-            apt install -y nasm libtool autotools-dev autoconf
             ls -l $BLOSC2_INSTALL_PREFIX
             ls -l $ISAL_INSTALL_PREFIX
 

Cargo.toml

@@ -28,7 +28,12 @@ xz                       = ["xz-static"]
 xz-static                = ["libcramjam/xz-static"]
 xz-shared                = ["libcramjam/xz-shared"]
 
-igzip                    = ["libcramjam/igzip"]
+igzip                    = ["isal-static"]
+isal-static              = ["libcramjam/isal-static"]
+isal-shared              = ["libcramjam/isal-shared"]
+use-system-isal-static   = ["libcramjam/use-system-isal", "libcramjam/isal-static"]
+use-system-isal-shared   = ["libcramjam/use-system-isal", "libcramjam/isal-shared"]
+
 gzip                     = ["gzip-static"]
 gzip-static              = ["libcramjam/gzip-static"]
 gzip-shared              = ["libcramjam/gzip-shared"]
@@ -48,7 +53,8 @@ wasm32-compat            = ["libcramjam/wasm32-compat"]
 
 [dependencies]
 pyo3 = { version = "^0.22", default-features = false, features = ["macros"] }
-libcramjam = { version = "0.5.0", default-features = false }
+# libcramjam = { version = "0.5.0", default-features = false }
+libcramjam = { git = "https://github.com/cramjam/libcramjam.git", branch = "bump-isal", default-features = false }
 
 [build-dependencies]
 pyo3-build-config = "^0.22"