diff --git a/.github/workflows/musl.yaml b/.github/workflows/musl.yaml
index 587dfd8..0023b20 100644
--- a/.github/workflows/musl.yaml
+++ b/.github/workflows/musl.yaml
@@ -17,7 +17,7 @@ permissions: read-all
 
 jobs:
   R-CMD-check:
-    name: Alpine 3.20
+    name: Alpine 3.19
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/r-hub/r-minimal/r-minimal:latest
@@ -28,6 +28,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install compilers, system libs
+        run: |
+          apk add gcc musl-dev g++ curl-dev linux-headers checkbashisms
+        shell: bash
+
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
           extra-packages: any::rcmdcheck
@@ -39,3 +44,5 @@ jobs:
         with:
           upload-snapshots: true
           build_args: 'c("--no-manual","--compact-vignettes=gs+qpdf")'
+        env:
+          _R_SHLIB_STRIP_: false
diff --git a/src/dns.c b/src/dns.c
index 1ae78c5..a413eb4 100644
--- a/src/dns.c
+++ b/src/dns.c
@@ -308,10 +308,15 @@ SEXP r_nsl(SEXP hostname, SEXP server, SEXP class, SEXP type) {
   SET_VECTOR_ELT(result, 0, records);
   SET_VECTOR_ELT(result, 1, mkNamed(LGLSXP, flagnames));
 
+#if (__RES >= 19991006)
   struct __res_state state;
   res_state statep = &state;
   memset(statep, 0, sizeof(state));
   ret = res_ninit(statep);
+#else
+  res_state statep = &_res;
+  ret = res_init();
+#endif
   if (ret) R_THROW_SYSTEM_ERROR("Failed to initialize resolver library");
 
   if (!isNull(server)) {
@@ -322,21 +327,29 @@ SEXP r_nsl(SEXP hostname, SEXP server, SEXP class, SEXP type) {
     statep->nsaddr_list[0].sin_addr = addr;
   }
 
+#if (__RES >= 19991006)
   ret = res_nquery(
     statep,
+#else
+  ret = res_query(
+#endif
     CHAR(STRING_ELT(hostname, 0)),
     INTEGER(class)[0],
     INTEGER(type)[0],
     answer,
     sizeof answer);
   if (ret == -1) {
+#if (__RES >= 19991006)
     res_nclose(statep);
+#endif
     R_THROW_SYSTEM_ERROR("DNS query failed");
   }
 
   ret = ns_initparse(answer, ret, &msg);
   if (ret == -1) {
+#if (__RES >= 19991006)
     res_nclose(statep);
+#endif
     R_THROW_SYSTEM_ERROR("Cannot parse DNS answer");
   }
 
@@ -369,7 +382,9 @@ SEXP r_nsl(SEXP hostname, SEXP server, SEXP class, SEXP type) {
 
     ret = ns_parserr(&msg, ns_s_an, i, &rec);
     if (ret == -1) {
+#if (__RES >= 19991006)
       res_nclose(statep);
+#endif
       R_THROW_SYSTEM_ERROR("Cannot parse DNS record");
     }
     class = ns_rr_class(rec);
@@ -417,7 +432,9 @@ SEXP r_nsl(SEXP hostname, SEXP server, SEXP class, SEXP type) {
       ret = xxns_name_uncompress(ns_msg_base(msg), ns_msg_end(msg),
                                  data, buf, sizeof buf);
       if (ret < 0) {
+#if (__RES >= 19991006)
         res_nclose(statep);
+#endif
         R_THROW_SYSTEM_ERROR("Cannot parse SOA DNS record");
       }
 
@@ -429,7 +446,9 @@ SEXP r_nsl(SEXP hostname, SEXP server, SEXP class, SEXP type) {
       ret = xxns_name_uncompress(ns_msg_base(msg), ns_msg_end(msg),
                                  data, buf2, bufsize);
       if (ret < 0) {
+#if (__RES >= 19991006)
         res_nclose(statep);
+#endif
         R_THROW_SYSTEM_ERROR("Cannot parse SOA DNS record");
       }
 
@@ -439,7 +458,9 @@ SEXP r_nsl(SEXP hostname, SEXP server, SEXP class, SEXP type) {
       }
 
       if (ns_msg_end(msg) - data < 5*NS_INT32SZ) {
+#if (__RES >= 19991006)
         res_nclose(statep);
+#endif
         R_THROW_ERROR("Cannot parse SOA DNS record");
       }
       for (j = 0; j < 5; j++) NS_GET32(soa[j], data);
@@ -457,14 +478,18 @@ SEXP r_nsl(SEXP hostname, SEXP server, SEXP class, SEXP type) {
     }
 
     if (ret < 0) {
+#if (__RES >= 19991006)
       res_nclose(statep);
+#endif
       R_THROW_SYSTEM_ERROR("Cannot parse NS/PTR/CNAME DNS record");
     }
 
     if (!raw) SET_VECTOR_ELT(VECTOR_ELT(records, 4), i, mkString(buf));
   }
 
+#if (__RES >= 19991006)
   res_nclose(statep);
+#endif
   UNPROTECT(3);
   return result;
 }