diff --git a/0001-Ignore-some-env-vars.patch b/0001-Ignore-some-env-vars.patch
new file mode 100644
index 0000000..fa36fe5
--- /dev/null
+++ b/0001-Ignore-some-env-vars.patch
@@ -0,0 +1,37 @@
+From b1af4f10aa3ec94b2f16d092cfd9f0025a1c5f58 Mon Sep 17 00:00:00 2001
+From: William Brown <william@blackhats.net.au>
+Date: Sun, 27 Mar 2022 11:19:09 +1000
+Subject: [PATCH] Ignore some env vars
+
+---
+ src/cmdline.rs | 14 +++++++++++++-
+ 1 file changed, 13 insertions(+), 1 deletion(-)
+
+diff --git a/src/cmdline.rs b/src/cmdline.rs
+index 13773c7..bd89cb3 100644
+--- a/src/cmdline.rs
++++ b/src/cmdline.rs
+@@ -208,7 +208,19 @@ pub fn parse() -> Result<Command> {
+             //
+             // FIXME: Maybe we should strip out `LD_PRELOAD` always?
+             if env::var_os("RUNNING_UNDER_RR").is_some() {
+-                env_vars.retain(|(k, _v)| k != "LD_PRELOAD" && k != "RUNNING_UNDER_RR");
++                env_vars.retain(|(k, _v)|
++                    k != "LD_PRELOAD" &&
++                    k != "RUNNING_UNDER_RR" &&
++                    k != "HOSTNAME" &&
++                    k != "PWD" &&
++                    k != "HOST" &&
++                    k != "RPM_BUILD_ROOT" &&
++                    k != "SOURCE_DATE_EPOCH" &&
++                    k != "RPM_PACKAGE_RELEASE" &&
++                    k != "MINICOM" &&
++                    k != "DESTDIR" &&
++                    k != "RPM_PACKAGE_VERSION"
++                );
+             }
+ 
+             Ok(Command::Compile {
+-- 
+2.32.0 (Apple Git-132)
+
diff --git a/sccache.changes b/sccache.changes
index 36afee3..11f5e1d 100644
--- a/sccache.changes
+++ b/sccache.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Sun Mar 27 01:25:36 UTC 2022 - William Brown <william.brown@suse.com>
+
+- 0001-Ignore-some-env-vars.patch - sccache will ignore rebuilds if
+  env vars change. As a result, we need to filter a number of values
+  that rpm/osc-build injects that change frequently that disrupts
+  the ability for sccache to cache effectively.
+
 -------------------------------------------------------------------
 Fri Mar 25 05:23:56 UTC 2022 - William Brown <william.brown@suse.com>
 
diff --git a/sccache.spec b/sccache.spec
index 62700c8..43b385f 100644
--- a/sccache.spec
+++ b/sccache.spec
@@ -33,6 +33,7 @@ Source11:       sccache-dist-scheduler.service
 Source12:       builder.conf
 Source13:       scheduler.conf
 Source14:       client.example
+Patch1:         0001-Ignore-some-env-vars.patch
 BuildRequires:  cargo-packaging
 BuildRequires:  pkgconfig(openssl)
 Requires:       bubblewrap
@@ -46,6 +47,8 @@ the Google Cloud Storage (GCS) API.
 %prep
 %setup -q
 %setup -qa1
+%patch1 -p1
+
 mkdir .cargo
 cp %{SOURCE2} .cargo/config
 # Remove exec bits to prevent an issue in fedora shebang checking