diff --git a/spk/build/_sources.py b/spk/build/_sources.py
index 3dacf79ce0..4dcc94a114 100644
--- a/spk/build/_sources.py
+++ b/spk/build/_sources.py
@@ -6,7 +6,7 @@
 
 from .. import api, storage
 from ._env import data_path
-from ._binary import BuildError
+from ._binary import BuildError, get_package_build_env
 
 _LOGGER = structlog.get_logger("spk.build")
 
@@ -91,12 +91,18 @@ def collect_sources(spec: api.Spec, source_dir: str) -> None:
     """Collect the sources for a spec in the given directory."""
     os.makedirs(source_dir)
 
-    for source in spec.sources:
-
-        target_dir = source_dir
-        subdir = source.subdir
-        if subdir:
-            target_dir = os.path.join(source_dir, subdir.lstrip("/"))
-            os.makedirs(target_dir, exist_ok=True)
-
-        source.collect(target_dir)
+    original_env = os.environ.copy()
+    os.environ.update(get_package_build_env(spec))
+    try:
+        for source in spec.sources:
+
+            target_dir = source_dir
+            subdir = source.subdir
+            if subdir:
+                target_dir = os.path.join(source_dir, subdir.lstrip("/"))
+                os.makedirs(target_dir, exist_ok=True)
+
+            source.collect(target_dir)
+    finally:
+        os.environ.clear()
+        os.environ.update(original_env)
diff --git a/spk/build/_sources_test.py b/spk/build/_sources_test.py
index d779f92575..085b496289 100644
--- a/spk/build/_sources_test.py
+++ b/spk/build/_sources_test.py
@@ -1,5 +1,6 @@
 import os
 import tarfile
+from typing import Any
 
 import py.path
 
@@ -39,3 +40,42 @@ def test_sources_subdir(tmpdir: py.path.local) -> None:
     assert not dest_dir.join("local/.git").exists(), "should exclude git repo"
     assert dest_dir.join("local/file.txt").isfile()
     assert dest_dir.join("local/source_file.txt").isfile()
+
+
+def test_sources_environment(tmpdir: py.path.local, capfd: Any) -> None:
+
+    spec = api.Spec.from_dict({"pkg": "sources-test/0.1.0/src"})
+    expected = "\n".join(
+        [
+            "SPK_PKG=sources-test/0.1.0/src",
+            "SPK_PKG_NAME=sources-test",
+            "SPK_PKG_VERSION=0.1.0",
+            "SPK_PKG_BUILD=src",
+            "SPK_PKG_VERSION_MAJOR=0",
+            "SPK_PKG_VERSION_MINOR=1",
+            "SPK_PKG_VERSION_PATCH=0",
+            "SPK_PKG_VERSION_BASE=0.1.0",
+        ]
+    )
+    script_source = api.ScriptSource.from_dict(
+        {
+            "script": [
+                "echo SPK_PKG=${SPK_PKG}",
+                "echo SPK_PKG_NAME=${SPK_PKG_NAME}",
+                "echo SPK_PKG_VERSION=${SPK_PKG_VERSION}",
+                "echo SPK_PKG_BUILD=${SPK_PKG_BUILD}",
+                "echo SPK_PKG_VERSION_MAJOR=${SPK_PKG_VERSION_MAJOR}",
+                "echo SPK_PKG_VERSION_MINOR=${SPK_PKG_VERSION_MINOR}",
+                "echo SPK_PKG_VERSION_PATCH=${SPK_PKG_VERSION_PATCH}",
+                "echo SPK_PKG_VERSION_BASE=${SPK_PKG_VERSION_BASE}",
+            ]
+        }
+    )
+    dest_dir = tmpdir.join("dest")
+    spec.sources = [script_source]
+    collect_sources(spec, dest_dir.strpath)
+
+    out, _ = capfd.readouterr()
+    assert (
+        out.strip() == expected
+    ), "should have access to package variables in sources script"