feat(hmpl): render simple placeholder with memory leak of course

package/c/chectic/default.nix

@@ -0,0 +1,37 @@
+{ stdenv, gcc, lib }:
+
+stdenv.mkDerivation {
+  pname = "chectic";
+  version = "1.0";
+  src = ./.;
+  doCheck = true;
+
+  buildPhase = ''
+    mkdir -p target
+    ${gcc}/bin/cc -Wall -Wextra -g \
+      -std=c99 \
+      -pedantic -fsanitize=address \
+      -c chectic.c -o target/chectic.o
+    ${gcc}/bin/ar rcs target/libchectic.a target/chectic.o
+  '';
+
+  checkPhase = ''
+    mkdir -p target/test
+    for test_file in test/*.c; do
+      exe="target/test/$(basename ''${test_file%.c})"
+      ${gcc}/bin/cc -Wall -Wextra -g -pedantic -fsanitize=address -I. "$test_file" -Ltarget -lchectic -o "$exe"
+      "$exe"
+    done
+  '';
+
+  installPhase = ''
+    mkdir -p $out/lib $out/include
+    cp target/libchectic.a $out/lib/
+    cp chectic.h $out/include/
+  '';
+
+  meta = {
+    description = "libhectic";
+    license = lib.licenses.mit;
+  };
+}