diff --git a/lib/common/attrs.c b/lib/common/attrs.c
index 2be03b424d..76e3f0de0a 100644
--- a/lib/common/attrs.c
+++ b/lib/common/attrs.c
@@ -1,89 +1,98 @@
 /*
- * Copyright 2011-2022 the Pacemaker project contributors
+ * Copyright 2011-2023 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
  * This source code is licensed under the GNU Lesser General Public License
  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
  */
 
 #ifndef _GNU_SOURCE
 #  define _GNU_SOURCE
 #endif
 
 #include <crm_internal.h>
 
 #include <stdio.h>
 
 #include <crm/msg_xml.h>
 #include <crm/common/attrd_internal.h>
 
-#define LRM_TARGET_ENV "OCF_RESKEY_" CRM_META "_" XML_LRM_ATTR_TARGET
+#define OCF_RESKEY_PREFIX "OCF_RESKEY_"
+#define LRM_TARGET_ENV OCF_RESKEY_PREFIX CRM_META "_" XML_LRM_ATTR_TARGET
 
 /*!
  * \internal
  * \brief Get the node name that should be used to set node attributes
  *
  * If given NULL, "auto", or "localhost" as an argument, check the environment
  * to detect the node name that should be used to set node attributes. (The
  * caller might not know the correct name, for example if the target is part of
  * a bundle with container-attribute-target set to "host".)
  *
  * \param[in] name  NULL, "auto" or "localhost" to check environment variables,
  *                  or anything else to return NULL
  *
  * \return Node name that should be used for node attributes based on the
  *         environment if known, otherwise NULL
  */
 const char *
 pcmk__node_attr_target(const char *name)
 {
     if (name == NULL || pcmk__strcase_any_of(name, "auto", "localhost", NULL)) {
+        char buf[128] = OCF_RESKEY_PREFIX;
+        size_t offset = sizeof(OCF_RESKEY_PREFIX) - 1;
         char *target_var = crm_meta_name(XML_RSC_ATTR_TARGET);
         char *phys_var = crm_meta_name(PCMK__ENV_PHYSICAL_HOST);
-        const char *target = getenv(target_var);
-        const char *host_physical = getenv(phys_var);
+        const char *target = NULL;
+        const char *host_physical = NULL;
+
+        snprintf(buf + offset, sizeof(buf) - offset, "%s", target_var);
+        target = getenv(buf);
+
+        snprintf(buf + offset, sizeof(buf) - offset, "%s", phys_var);
+        host_physical = getenv(buf);
 
         // It is important to use the name by which the scheduler knows us
         if (host_physical && pcmk__str_eq(target, "host", pcmk__str_casei)) {
             name = host_physical;
 
         } else {
             const char *host_pcmk = getenv(LRM_TARGET_ENV);
 
             if (host_pcmk) {
                 name = host_pcmk;
             }
         }
         free(target_var);
         free(phys_var);
 
         // TODO? Call get_local_node_name() if name == NULL
         // (currently would require linkage against libcrmcluster)
         return name;
     } else {
         return NULL;
     }
 }
 
 /*!
  * \brief Return the name of the node attribute used as a promotion score
  *
  * \param[in] rsc_id  Resource ID that promotion score is for (or NULL to
  *                    check the OCF_RESOURCE_INSTANCE environment variable)
  *
  * \return Newly allocated string with the node attribute name (or NULL on
  *         error, including no ID or environment variable specified)
  * \note It is the caller's responsibility to free() the result.
  */
 char *
 pcmk_promotion_score_name(const char *rsc_id)
 {
     if (pcmk__str_empty(rsc_id)) {
         rsc_id = getenv("OCF_RESOURCE_INSTANCE");
         if (pcmk__str_empty(rsc_id)) {
             return NULL;
         }
     }
     return crm_strdup_printf("master-%s", rsc_id);
 }