diff --git a/.github/workflows/static_build.yml b/.github/workflows/static_build.yml
index 851cf0d38f..9a872c71cf 100644
--- a/.github/workflows/static_build.yml
+++ b/.github/workflows/static_build.yml
@@ -70,6 +70,21 @@ jobs:
         run: |
           cd micromamba-feedstock/
           sed -i '' '/conda_forge_output_validation/d' conda-forge.yml
+      # Already applied upstream in mamba; feedstock patch is for released tarballs only.
+      - name: Remove psl dependencies patch
+        run: |
+          python3 - <<'PY'
+          from pathlib import Path
+
+          path = Path("micromamba-feedstock/recipe/meta.yaml")
+          path.write_text(
+              "".join(
+                  line
+                  for line in path.read_text().splitlines(keepends=True)
+                  if "0001-psl-dependencies.patch" not in line
+              )
+          )
+          PY
       - name: Checkout mamba branch
         uses: actions/checkout@v7
         with:
@@ -178,6 +193,7 @@ jobs:
             reproc-cpp-static>=14.2.4.post0
             libmsgpack-c-static
             libcurl-static>=8.4.0
+            libpsl-static
             libarchive-minimal-static
             zstd-static
             zlib
diff --git a/dev/environment-micromamba-static.yml b/dev/environment-micromamba-static.yml
index 213a50a0d4..703333834d 100644
--- a/dev/environment-micromamba-static.yml
+++ b/dev/environment-micromamba-static.yml
@@ -24,6 +24,7 @@ dependencies:
   - reproc-cpp-static >=14.2.4.post0
   - libcurl >=8.4.0
   - libcurl-static >=8.4.0
+  - libpsl-static
   - libmsgpack-c-static
   - xz-static
   - libssh2-static
diff --git a/libmamba/CMakeLists.txt b/libmamba/CMakeLists.txt
index f8fe3eb4ca..2f10878112 100644
--- a/libmamba/CMakeLists.txt
+++ b/libmamba/CMakeLists.txt
@@ -511,6 +511,7 @@ macro(libmamba_create_target target_name linkage output_name)
             set(
                 REQUIRED_STATIC_DEPS
                 libcurl.a
+                libpsl.a
                 libssh2.a
                 libgssapi_krb5.a
                 libkrb5.a
@@ -624,6 +625,7 @@ macro(libmamba_create_target target_name linkage output_name)
                 libssl_static.lib
                 libcrypto_static.lib
                 libcurl_a.lib
+                libpsl.a
             )
 
             set(STATIC_DEPS "")
@@ -644,7 +646,19 @@ macro(libmamba_create_target target_name linkage output_name)
 
             target_link_libraries(${target_name} PUBLIC ${SYSTEM_PROVIDED_LIBRARIES} ${STATIC_DEPS})
 
-            add_compile_definitions(LIBARCHIVE_STATIC CURL_STATICLIB)
+            # Necessary for properly linking static libraries.
+            add_compile_definitions(
+                # See:
+                # https://github.com/libarchive/libarchive/blob/19ff56da4f4790064346579a1a7f18a0230b0ac6/libarchive/archive_entry.h#L134-L158
+                LIBARCHIVE_STATIC
+                # See:
+                # https://github.com/curl/curl/blob/1d7b8e6c29e22c88750fb53a01e30be03104a3fd/docs/FAQ.md?plain=1#L1074-L1077
+                CURL_STATICLIB
+                # See:
+                # https://github.com/rockdaboot/libpsl/blob/8c06e95b8878f6b80613d7628486056728429d09/include/libpsl.h.in#L45-L55
+                PSL_STATIC
+            )
+
             include_directories("${_mamba_deps_prefix}/include/")
         endif()
     else()